It looks more like a drawing than a photograph, and truthfully I don't know why. I am not saying that look is a bad thing either, but something about it looks reproduced--not in a bad way, though. Many great photos are not totally realistic replications.
I'd say you did a great job. I'd like to see what it looks like slightly brighter, but I have a feeling it would lose something if you did that (always a tradeoff...lol)