Illustrator Portrait Art | Female Portrait

Hello all!

This will make my second upload. For more information about how I actually created this portrait, please check out my first version of this (it has a black background).

This was actually the first version of this female, though I liked the black version more so I uploaded that first.

One of the challenges I had was adding the shadows to the right places, and highlighting the hair in the way. Any ideas?

Tell me what'd you think & let's start a discussion!