They are all great shoots
.On the second one, I like the pose, I like even her smile, but her left hand does not work for me, I feel the fingers to spread (just my personal opinion)
On the 3rd one, beside her forced smile the ligth & shadows in her face disturbe me.
If she is a professional model, and she doesn't like to smile, try some shoots with no smile, probably you can get a more sensual/agressive look, like the red haired on the first shoot.
Please continue shooting in studio, and share your shoots.