Seems to be missing a hint of dimension on the first ones against white. Maybe a dim snoot on the hat or something from another angle, but it's flat for my taste. The 3rd one is getting a bit more light and dimension on the hat. I like the 3rd best of the first three.
The latter shots I like better due to added dimension. I suppose image #4, the first of that set, is my favorite of those, probably because her face is also visible. The photo following is my 2nd favorite. The last shot seems to have the least grace for pose, but I still like that lighting better than the black on white at the beginning. I'm trying to visualize the last photo with another 1/3 void space to the left instead of cropped tight near her straightest side.