I like the way it came out as well. I love the shadow that her hair makes on her eye. Something I always forget; tell the subject not to wear white when doing studio portraits.
I like it, only a minor criticism, but it seems a little lop sided - for the amount of negative space on the left I would like to see a slightly less agressive crop on the suibject (i.e. little more of the head visible), or slightly less black.
That said, it's nice as it is, nice exposure and lighting. Well done
I really like the crop here. The color in the subject is really nice, especially in her hair. The simple black background gives a nice focus on the subject. The only thing I'm not crazy about is the overexposure on the shirt; the bright light kind of draws my eye away from her face.