it may just be your style, but i think the whole dot-nose needs a little more definition with shading otherwise it seems like their face just comes to an odd looking point if they were to be seen from the side.the hair though-- i love the strands framing the face, but it seems like the further you got away from that, the more confused your shading became, mostly seen at the top of the head. i know this style is messy, but perhaps next time you should try to find the part at the center of the hair/head and start shading individual pieces branching out from that. i mean, it looks to me like there IS shading to define the part, but a little more attention paid there would do a lot of good.