I've been working on some black and white line work lately and I have really noticed how eyes can really change the "age" of an illustration. Above are 2 examples. The first girl looks has a tween/teen/edgy feel, while the second has more like a younger/softer feel. The eyes really do make the piece.

I've been changing my style of eyes lately. My wide-eyed style just dosen't appeal to me as much as before. They are starting to look a little scary on the illustrations I've been playing around with. So, I've been changing them up a bit and I like my new eyes a little better (not so wide-eyed and little dots).

A while back Loobylu had a post about eyes that was pretty interesting.