If you want my honest opinion, the poofiness in the diapers do have some resemblence to  BunnyKisses and  Kurikia's styles, although both are unique in their own aspects. Therefore I have no complaints about your art. Perhaps you may wish to try drawing something other than Pokemon to widen your talent.

All I can say is... maybe give your characters a little more depth. I think it could be even better if you tried more advanced software to add 4D texturing. Color grading is not the only thing to look at, it's all about undertone, overtone, and presentation. Your art is very noticeable, and frequently draws attention. What you want to do is keep people's attention for even longer by giving them more shades of emotion and scene to look at.

Aside form that, the only the only thing missing is being able to see the highres of every single image you upload, which I'm sure plenty of people would enjoy.

While I admire someone looking to improve themselves, sometimes it can be unhealthy. An artist is always going to be their own most harsh critic. I personally think you're on a level above my own personal art, but I couldn't say why my art would be worse. But, that's just my own personal bias.

My advice is to find someone whose art you consider to be better than yours. Because "better" is very subjective. But, if you decide that you want to know what the difference is between your art at someone else's - that's a lot easier to quantify. Showing what you wish your art looked more like is a way to show people what you are trying to achieve, and might spur on a discussion on how you can get there.

tbh i think you have a unique style and way of drawing , i see nothing wrong with the output of your art, your art is yours and you made it , so be proud of what you have, and you'll always be better in time and practice. even the best get better.

The diaper designs and the way your 'selected characters' uses them are no problem on your behalf, but I think it's mostly that you done a lot of Pokemon themed. Try a different approach, more importantly, a different specie character.

In a word, I think your style looks great~! X3

What makes you think you're not as good as other artists? Comparing to other people isn't always the better option.

If I had to give an advice it would be to favour quality over quantity. Most of your drawings take up 2 hours (as stated in their descs), even less for pastel drawings. Just no :v put more time, a lot more time into each drawing, rushing every pic to be able to draw more will both not help you improve at all and will dry you up if ideas. Same goes for traditional pictures, drawing in new ways is always fun and helps a lot when it comes to learning new things, obviously, but if you rush it you'll never have enough time to actually try new stuff. So in short quality>quantity

Sorry if I seem a little rude or sour, but I don't intend to be, just trying to help xp

It's interesting that you say you have 'impostor syndrome' with your art since one of the primary issues is a sort of uncanny valley effect. Faces are one of the main culprits, but your body proportions are also sometimes off.
Take this Umbreon picture for example: http://d.facdn.net/art/kodikins/153.....5_piddleon.jpg
Compare it to the official artwork: https://cdn.bulbagarden.net/upload/.....197Umbreon.png
Note the circle design on its legs; it appears on the side and upper half. Yours however has the circle going past the top of the foreleg and onto the body. The hind leg is a little more subtle, but it's full-on facing the viewer when it should be on the side of the leg and therefore should only be partially visible to the viewer.

I'm also not really sure what's happening with the pose; are they lifting their leg up to pee? It looks like it's also against that rock, but having your character interact with a background element that's distinctly different in art style (it's out of focus and lacking detail compared to the Umbreon, while also having the outline border creating even more of a contrast between the two) makes it difficult to tell whether they just happen to line up (in which case the elements should be visually removed from each other to prevent accidental association) or if they're supposed to actually be touching it. The angle of their lean also makes them look off-balance, like they're about to tumble onto their right side (viewer's left).

You're trying to go for an embarrassed look, but the paw placement looks like it'd be poking their eye. I honestly didn't notice that until a few closer viewings so it's probably not something people would actually pay attention to, but regardless it doesn't look very comfortable.

Another picture would be your recent Ninetails one: http://www.furaffinity.net/view/28511517/
Compare to: https://cdn.bulbagarden.net/upload/.....8Ninetales.png
Mainly it's the tails; they're just appearing from behind the diaper, as if it's just a character dressup simulator prop (best example I can think of). The diaper should have a hole in a fitting place for the tails to pop out of and, as a result, they should be bunched up together from that point rather than spreading out as if there's nothing in their way. You also made them vertically orientated, I presume because you wanted all nine tails to be clearly seen, but Ninetails has more of a peacock-like design.

Posing and taking notice of how angles skew perspective are your main issues right now. Faces and shading have also been off at times but you've improved in those areas by yourself more than you have with posing and perspective, so I'd suggest putting them on the backburner for now.

I personally dont see any problems with your drawings, they have all been well drawn and really cute x3 You tend to use a nice variety of colours, nice poses/situations of the characters! You draw them so well! I even really like your traditional art, despite it being a different style, they do always come our real nice!

Oh and also, dont compare yourself to other artists. Its surprisingly not good for your health if you end up taking it too far xP

What wrong with your drawings for myself is very simple they are not childish or cute enough such as the things in my fav list.

Oh boy, an artist giving me permission to give criticism! Your art is cute and the idea behind of them should be CuddleHooves level of diabetes cuteness in theory but sadly there is a weird Uncanny Valley effect happening somewhere. I think thebackup gave good examples already of how you using characters as props for cute scenes and not having the characters simply be cute as an effect of the scenarios themselves. Basically you should aim to have the characters act more naturally and even if it means they don't have the best possible diaper in the air pose that in theory would been super cute it would also not have that weird uncanny valley with it. Also being more on model would help a ton with that as well though depending on the person OC/fan character that might be easier said than done. I think you should also just try to make more simpler chibi-like styles and not tryharding the realistic look, realistic can be good but in terms of fetish art people generally want and even accepts fantasy, you should work with that and not against it.

Of course though criticism isn't just stating everything that is bad, stuff you are good at includes but not limited to how you draw diapers, poses and in some cases even scenarios (once again your issue is just having the subject look more natural in these scenarios, the scenarios themselves are completely fine most of the time), personally be loving the simple background as it give a in-a-daze effect which work wonderfully here: http://www.furaffinity.net/view/28344473/ but can make things also look super out of place when the character is more realistic such as here: http://www.furaffinity.net/view/28534599/ (which why I recommend trying to go for more chibi-like styles and see if that works better in such cases) though no offense to D.A.O.T but his character is a little too real for such a simple background, at least imo. Like as you noticed while all of that is meant to be good criticism I can't help but remind you what make them seem off. It only thing one thing to make something look off but take many things to make something look off into something that look right. I feel as an artist you are amazing but also have amazing potential that you simply don't know how to tap into yet. I want to see you become better because I truly and honestly believe you are on CuddleHooves level you just don't know how to apply it yet. Also for the love of God I mean that in the best way possible but don't start comparing yourself to other artists as you should only compare your own progress to your own work. Comparing you should be inspiring you but I know for many artists it can also lead them to wanting to quit. I mean what I say but I also don't want you to fail before you even get to reach that point due to you discouraging yourself. Your art is amazing and you should feel amazing and the fact you want to improve even more beyond that is proof that you are on the right track of becoming even better.

Calm down... Your art is fine.

Honestly the artists biggest critic is himself. This is true for every artist. You will always feel like you could improve one way or another. Really it all comes down to self confidence. If you look at your art and think it's not good enough then try to do something different next time. New perspectives are the best answer to self critiquing. Just remember not to try to please others with your art, as art is what you think and feel. So the only perspective that matters in the long run is your own. That's why any and all suggestions we can make for you won't do much.

Regardless of what happens I do look forward to seeing what you create next. You've got a fan on your hands that no matter the art or the message is going to want to see it.

Your art is fine.