While the height of the features and their positioning height wise would work in a frontal view, the shade of the head suggest a down tilt - therefore throwing it all off.
Heads are tough and I'm still not satisfied with my heads, without getting a good feel for them in the 3d space, it's very hard to get them right - it's even hard to spot errors sometimes
You might want to analyze some 3d head models (
http://www.posemaniacs.com/ has one, you might want to google the Asaro head, pictures only though) and check some tutorials about "constructing" the head - you might want to check the books by Andrew Loomis or take a peek at tutorials here:
http://www.proko.com/ I know those are for the realistic approach, but it's necessary for good stylization - also, drawing on paper highly recommended
If you're in a pinch and just need to have the mugshots done, try to make the faces straight on, or a 3/4 view without a downtilt - it will be easier to get it right.
As far as pixel tech goes, you might want to work on the lines - both sides of the chin look very angular. There's also banding on the eyebrows, lower lip' shadow and right side (of the picture) of the nose.