Your lighting in this is really pretty. The bokeh does not lend itself to this photo. It is so dark that it almost disappears completely. Your model is not looking at the camera and because this is such a tight shot, it loses interest as we have no idea why you chose to capture her at this particular moment. If you had shot a little wider, perhaps we would see whatever she may be looking at as well.
Secondly...why are you trying to make me care for the back side of someones head? I can care less for the curly hair. Hair has no emotional impact, no matter how you try.
The crop is off as well.
The only good thing in this image is the dof, the rim light off the face which I would of wanted to see more for the emotional value, and the key light kicking off the shoulder.
Not going to do so well in this challenge, especially on this web site.
Not sure what the point of this photo was (not meant in a bad way). Your subject is looking away from teh camera, so all you see is the back of his/her head. You don't really show what they are looking at either.