dat ass
is really really big...
also his right arm is kinda weird looking :x
edit: sorry for lack of clarity i just didnt wanna come across as offensive
the thing is that it looks like he's missing lats completely since there's no crease where the shoulder hits the back. furthermore, his arm doesn't seem to really have a shoulder muscle, as the part that is the ending of the clavicle seems to be too pointy and doesn't curve into the arm as it should. the outline of the arm seems to be too flat. finally, his arm is rotated so it seems like you should see a bicep on the other side, but the shading implies the bicep is on the same side of the whole arm (if this makes doesn't make sense, i'll try to clarify), making it seem like it's a tricep.
this picture kinda shows it (i couldn't find a better one)
edit 2: actually after looking in a mirror it seems his stance is kinda awkward /:
its still a good pic tho! esp the color selection and the feet (which i can never get)