Badass Sci Fi Chick

This is something I drew in my sketchbook and decided to color. I don't know who she is, but she looks angry. I kind of love how I draw characters I don't know sometimes... It's like they have a life of their own, and I just happened to catch them for one moment in time.
I'm still trying to settle into a comfortable way of working. I keep experimenting with slightly different styles and digital techniques. I've started working right over my drawings and keeping the line/shading, and I like that. Now I'm just trying to figure out how much value I want to put in- if I want them to be really rounded and lit, or if I want to keep it more simple, and how much of the original line I should keep/how prominent it should be.