I just want to point out a few things that I think would kick-start this to an even better status:

1) On the left side, it looks like your background is overlapping with itself, and it's a bit jarring. Smooth that out, maybe kick back the strength of the background a little bit so it isn't competing for attention with the figure itself, and that'll look great. As it stands now, that overlap is catching my eye, and all the strong black dots are making me go a bit cross-eyed. I almost want to look away, rather than look into it more.

2) While I love the lighting in the torso and the highlights, it feels to me like the cloth, legs, and neck didn't get the same level of love. It's so close to being awesome, and it's falling just short. If I had to name the one to fix, it's definitely that white cloth. It doesn't feel like it has any depth or fold to it, that it's just there to be there. Give it some shadow, maybe a shadow that falls on the legs in some fashion as well, and it'll feel like it belongs and help tie the bottom half of the character to the top.

Those are my two cents. Beyond those points, this is looking great. Interesting design to the character, solid shadows and highlights, and is just very easy to read.

don't worry from critique, i learn. So yes your first point i tend to agree with that and fix it probably tonight . second : i wanted the chest to be the focal point, if i detail everything the same way which i the painting will look weird. I did this with the legs to experiment with it, and it looked just really weird.

I will actually just try to shade it again, perhaps i did something Wrong who knows.

But thanks for the critique it was helpful

All I have to say on this is fantastic, it's like a Turian version of the collector armour.
I agree with Deriaz on the back ground and lighting. But I would like to add to that.
A little more detailing on the flesh and cloth wouldn't go amiss. The maw/jaw line seems a bit shallow, as thought he is missing his lower jaw. It just seems as though his mandibles are shielding nothing.
You seem to have lost interest in your shading detail around the abdomen and reverted to flats, it darkens the image and detracts from the concept.

Sorry if I seem a little over critical, but you did ask for it >>

Just as the above comment i can take critique don't worry, and again as on top i will work on the background and (again) again as the top comment the chest was the focal point shading the whole body looked really odd to me,
and i suppose it's true that i somewhat didn't put much effort in the background. but as i stated i suck at drawing Environment i tried but utterly buttery failed , the cloth is odd too the global lighting doesn't affect the cloth which indeed is weird .

I will surely look after the points that i was given and actually work on them.
anyways i always appreciate critique it's actually more useful to me when people just comment

daaam o.O that looks freaking awsome :o

i love the blue vison on his head and the blue glow on his arm thats more in the dark :3

all in all a very well drawn piece of art ^^

Thank you, ^_^

MMmmmm, absolutely gorgeous.