First thing I noticed is that she kinda looks like a man. With the dithering on the chin, it kinda looks like a 2 day beard.
Second, the way you did the chin makes her look a bit fat, like she has a double chin.
You should make more difference between the nexk and the face. Darker, absolute shades. Lose the dithering there.
The AA on the hands doesn't work, I'll make an edit later if you want.