This is actually just a excersise. I have concentraded so much on watercolor that I needed to draw a little again. And the best way is to pick up on hair practice right where I left it! This is the last one of many that I started. The keyword for these is "less is more"
(This is a crappy scan. A better picture will come soon)
Firstly (and many other people have mentioned this already) - you absolutely nailed the hair! It is definitely the most striking feature of this sketch. (And most certainly is not an easy thing to achieve). The contrast you use is excellent, and makes the image really pop out in a more realistic manner. The mouth is skilfully done as well. The composition works well, and I like that it's all about the hair, but still has substance to the piece with the face peeping out. It's very striking. The only critique that I have about this sketch is the nose. The angle of the shading makes it appear slightly too high up - or as if the bridge of the nose is too short. Perhaps it would be better to define the ball of the nose a bit more to bring it more forward (it comes across as a little flat) - this will help to push it out and down, and appear longer. But overall, this is truly an excellent piece, done with obvious talent and skill. Keep up the great work!
The lighting is reflected lustrously off the hair while the darker side is in full composition. The dark areas are bold and without a doubt the reason it personifies the black and white outlook she has in life and is covering herself with the hair so she doesn't have to see what is front of her. The mouth is slightly opened since there is hollowness in her body and the nose being the center of the piece indicates that you truly are a person who enjoys taking a breath of air everyday while you see everyone busily wandering aimlessly about.