Can you make his eyes a little bigger?
Regarding posture; he is apparantly more like a cartoon character, with a low-body-definition, but I think the posture can become more poist, with a (little more) protruding chest, which would be a "consequence" of the body shaping itself after the spine in "his back". I could say skeleton here, but the spine thing is the easiest thing to achieve I guess.
I do not support Bush! Nor Saddam! Long live UN!