Sorry for my comments up to this---
For the eyes, I was looking for half-shut, sulked eyes - like he is depressed in emotion.
And for them, I can see they are somewhat off from your human head you drew there. Still, for some reason, it still looks fine to me...
I was looking for a half-half thing with chibi and keizer, as well as implementing my own style. I know that this is completely wrong and I shouldn't be thinking this, but I think it should be that way, with the eyes and how the face is. If you moved the right eye over towards the left one, it would look odd. The left one should be about a pixel thicker though...
I think a light source a little higher than yours, CrazyMLC, is what I want to go with.