I agree about the lighting - his face is a bit dark and because of the particular blend of cross-lighting, it doesn't flatter the face. This might also be improved by bringing his chin up a little more, so the brow doesn't shade the rest of the face so much and the cross/back-lighting wraps around more. I think he's a little too square to the camera, as well... you can get some more dynamic movement in the pose to reinforce the active look his outfit suggests.