The main thing is the shape of his face, it looks radically different from the angles of his pictures.
There's something else but it's like if you've ever drawn or other otherwise created something and you're very proud of it, but at the same time you know something is wrong with it and you just can't figure it out.
EDIT: Well I changed my search options and found several more that could work, but I have also discovered that that are many people I want to punch for no apparent reason. Y'ever have that feeling when you see someone's face and you don't even know them but you get this strong desire to punch them square in the face; like this
http://www.modelmayhem.com/portfolio/pic/14248747 I have no idea why but this guy's face makes me want to punch him.