fantastic photo, I am not sure why it didn't do better- nonetheless. I like the strong light on the right, which forces your eye to settle right on the side of the face/hair. just enough to make you wonder what she is thinking, too. excellent work.
too much light breaks through yonder window. the exposure is too ht over there, and distracts from what is some outstanding hair. A diffused fill-flash would work (even through a piece of paper) I'd have liked to see this one cropped a little lower, to catch a little low-back and the ends of her hair.
I do like this picture, however I think that there is too much hair and nothing else really to look at but hair. Also the light from outside is very overbearing and the light on her back is not enough. It may have also been nice to have made more use of the curtains on the left... just to add to the interest of the shot.