A cowgirl portrait

A self portrait, drawn using Illustrator, but with a brush instead of pen, on fine charcoal, tons of fun as far as line width variation goes. It feels very unfinished, but I've been staring at it too long and can't think what it's lacking...more shadows?? My hair is a mass of waves, and I like drawing curly/wavy lines in general in my sketches, so it fit

I did alter the half-circle with the pen tool, though. No way was that going to look nice and clean with the brush

EDIT: played with stroke widths and I think it looks much better