Most excellent on your first studio try.
Number 1 watch the light wrap around on how the facial structure will form the shadow. Nit picking here and it's not a distraction. Just be aware of how the light forms shadows on facial features. It's also a little "HEAD" heavy in the head shot. Give it some room at the bottom to compliment. Also lean the model forward and chin up just a bit would help the pose as well around the chin/neck area.
Number 2 is a little hot on the hair/rim light. Also her facial features would lend her to turn her neck into the light a little more. That angle would serve best with the lighting scenerio.
Number 3 you just have to ask what's the purpose? From a technical view the bright spill light distracts the eye to follow right to the arm laying down.
All in all you should be proud of your first studio lighting experience.