A great poseand effective lighting. If we ignore the background, the character study is great because the feautures project a very interesting rapport with the viewer. Colors are just great. Bumping up.
I'm not entirely sure why I like this so much, but I do. It reminds me of a 30-or-so year old snapshot - the toning is great; it really seems to match the slightly dissheveled hair. Focus is a little soft, but that keeps with the mood. Oddly appealing shot - nice work.
Sorry, I saw little here that distinguished it from a snap shot. I can see you used lots of lights: one or two for the background, and a strong one (or two)overhead. And these certainly distinguish it from a snapshot. Nevertheless they produce a snapshot quality. I find the curtains distracting. And the purple sweater makes no sense to me - the rest of the photo makes me expect a sepia. Also it looks blurry, as if the focus was on the curtains instead of the subject.