Hey this is really cool take on Grimmjow. The proportions and design all look correct, the colors look good. What you should work on is the linings as they look inconsistent, maybe it's just the software you used. Some of the shading near the abs look unnatural, you just need to fallow the lighting and soften up the shading. Overall this is a really good fan art! Commented on behalf of #Project Comment
This is a great drawing of one of my favourite bleach characters! I love the way you colored his hair and drew his face My only suggestion concerns his muscles: they look a little unnatural, because they are too regular. It looks like you've consider a fixed scheme instead of taking a real man as reference. You should vary a little their lines and shadowing according to me The rest of the drawing is perfect, so I will fave it as soon as this comment is added
Curiously enough Grimmjow've drawn without the hole in his chest. That somehow makes it look fuller body. Besides, it shows your extensive knowledge of human anatomy, for you have made a realistic adaptation of muscles in the human body. The colors are soft, very suitable for a picture like this. Excellent work!