Gonna try spriting

[StarSock64]

I don't really know what to say about the lineart right now, but I think you should play with your colors/shading more. The hair is kind of pillowshady. You don't need to have shading on all sides of each outline on the hair. The contrast on the...sweater...shirt...whatever you want to call it, is pretty intense. This is probably a better mistake to make than having too little contrast, but try to pull it back a bit. And play with hue shifting/saturation. Everything's looking pretty gray right now, and not in an appealing way.