This is a great image - I love the soft feeling to it. Only slight complaint is that the light on the forehead is just a little strong, but no points off for that from me. Nicely done!
It looks like your hair could have some great texture for the photo composition, but it's lost in the dark. I appreciate the idea, but I think the darkness detracts a bit.
I've never attempted one because they are too hard to get right. You're just a tad out of focus (or motion-blur?) and it really kills you in scoring I think. If it had been sharp, I would have ben giving it about 6 for light colour and composition