jst a few things yeah, his heads a tad too wide, and considering the position of his eyes and brows it looks as if his heads about to pop, doesn't help that his shoulders are so narrow.. His nose is a tad chissled, in fact a few bits of this just don't look natural, I'd just change the general shape of his head, hint the bottom of his nose, lower his eyebrows etc, just work on your facial anatomy a bit.
