All looks good but the lighting by his head could be better. I'm personally against soft brushing lighting. It makes it look forced and unnatural. Dodge tool ftw xD
BG looks a bit lq The lighting could be better like CI said The purple and green colors clashing is a bit unnatural Still, I really like this tag :]
Strange sig. The colors doesn't fit greatly with each other and the render is too dark. Exept this its a nice tag.