Aside from those mentioned, my eyes quickly went to the number one thing I am working on...focus. I can see great detail in the thread work of her sweater, while the eyes look a tad soft. If your using an auto-focus camera, make it focus on her eyes first (push halfway down on the shutter release button and hold), then frame and take the shot (Finish pushing the button all the way down.) Of course, it could just be the compression making look like that.
I agree with Fredrick, she looks like a good one to work with. Good luck!