#1 & 5 works well for me, 3 & 4 are the classic 1/3rd composition which is commonly used for commercial use (titles or text placed in the space etc.) although the models poses should have been better. Good job otherwise!
Number 4 makes the models leg look too fat. Always try not to photograph peoples legs head on when sitting, makes their calves look fat. Have the model turn slightly and maybe move forward on the seat so her calf isn't pressed against the seat.
I see what gunfighter is saying about #4 - and I didn't notice it until he pointed it out. But I just love the facial expression in #4. It's still my fav. Nice shots.
