Great job! I don't know this guy but he does look funny, not drawn funny, but a funny guy. The details of the shirt are excellent. The hands are that bad really. I've seen and drawn much worse than that. Only little thing I see is the middle of his right hand (our left side). The smile is really great. Only little tip I'd give is to use a very fine lines between teeth (unless it's an obvioius space there). It tends to look more realistic. Really, this is an excellent portrait!