His face didn't come out so well through the scanner... Yeah, I don't like faces very much, I suck at them. Especially lips, they always come out stupid looking.
good initiative of making it white around the character, but you could've also deleted the white lines via photoshop. the face have problems, you could find a better method than drawing a "L" for a mouth. he doesnt appear to have a pubic bone, since his hips are somewhat tiny. the torso is somewhat triangle shaped towards the top beceause of a huge muscle we have in our back, from any views, including profile view, its very visible. for his arms, i would suggest shading over harsh black lines. also i think there is minor proportions troubles, if he let his arms loose he could be able to touch his knees.