The first thing is to explore and identify that angle.
It look like you prefer to shoot her when she turns her head certain way. I personally don't like that - you see too much the white of the eye. I want my model to turn their head but not just roll their eyes to one side.
Also, I always use a fill light. If nothing else, I want to have a catching light in their eyes. Especially those models with brown or black eyes. The catching light add 眼神.
Each photographer has his or her own sense of exposures and white balance. I think you did a good job capture the spirit of the moment, excellent control of the depth of view, very good use of her hair, and the model is very natural. Overall, excellent 习作. 我very 喜欢