So he's getting ready for a night out mauling people. No wonder he's in a good mood.
This started off at an attempt to design a new character, but turned into a random werewolf dude. Which is why you should start with thumbnails rather than just diving in on a whim. I like the finished result though.
I'm now taking commissions in this style. A picture like this would be $95. http://www.hamstertoybox.com/commission-me/
Also, whilst I'm promoting myself, if you'd like a sticker or something of this image, they're available on my Redbubble store: http://www.redbubble.com/people/hamstertoybox/works/16188171-werewolf-transformation-with-background. At least I was organized enough to keep it high res :)