I think you did a nice job on the first hair style. I see no problems there.
On the left I did a mouth edit. Just seemed too wide and mis-shaped. On the right I went a bit more. I know you weren't looking for a lot of detail, but I get carried away with pixels sometimes. I found the head too wide and the neck a tad too long. And the shoulders had too much of a slope...just tried to balance things out and add more life.
(http://i.imgur.com/rRf0bwg.png)