its pretty good, but there are a couple things that get to me
one would be the little dark spots everywhere. I don't know if you intended it to be little shadin spots on the muscle, but they cover too small a range. Or if they're supposed to be dirt spots, they're too perfectly polygonal
it sorta looks more like his skin is made of chocolate chunk cookie dough
And the hand also is wierd. Now i'm not an anime watcher, but i think its pretty safe to say that even in anime, hands arent just circles with long fingers sticking out. The pinky and the thumb look really out of place, and thier all spaced out. If that circle is supposed to be like and energy ball chanrge or something? then it needs to be closed and hte fingers need more shading/base width to illustrate forward projection
just my take though, keep it up