This is what I personally like when It comes to adoptable characters, I hope this helps a little! uwu

I really like:
Huge, fat fluffy feline tails
I like eyebrow, ear, chest and hip piercings. (corset piercings are my favourite!)
Long ears bat-like ears
Tiny paws and hands are a soft spot of mine, makes the character look dainty.
I love cold colours such as purples and blues. I also like different shades of greys and blacks.
I like them to be chubby, not too fat not too thin. It makes them look cuter in my opinion
Pastel colours are also a favourite, they're really cute on adoptables!!

All of this. Has my approval. Lol thank you so much I really like all those ideas I'm very much into a lot if the same stuff! ♡

I'm glad you found this helpful, you're welcome! Btw I love your artwork. :)

Ill have to write a longer response one i get to a computer lol!
But i enjoy unique species adopts, most are usually out of my budget sadly :(
But i dont see may sharks, kangaroos, zebras, or giraffes

Otherwise high color contrasts grab my attention too :) like a pink dark gray, or a deep red and white

Canines with long pointy ears, Reptiles, horns, spikes, piercings pretty much anywhere lol, I like oranges and reds together, and blues and whites, or greens... really tall charters are cool- ooh rodents with rodent feet are super cute. Lol

Haha that's all I can think of for now c: