In #1, I'm not sure how I feel about the composition. That staircase (I think?) that is filling the left hand corner of the frame is awfully dark and it is sucking my eye right over to it. I really feel like it would've been the best of the bunch if that had not been included. You cut off the bottom of her foot just a wee bit, and again in #3. If I'm going for a full body shot, I always include all of the feet.
#2 has some harsh light. While I like her shadow.. I don't like the other shadows created by the wall in the image.
Totally just my opinion - overall - nice job and pretty model!