1 and 2 are weak, not much of a subject and the composition sucks.
At least try to jazz it up by giving it an unique prospective like shooting level with the rail, and have at least one rail in the corner of the frame.
& headless models don't cut it...
3, is the model suppose to be the focal point?
Make look like it and put her up front.
4 That's better
Remember you can shot from any height, lose the eye level shooting unless it shows the subject at its best.
5 Not a keeper, but you knew that. I hope so...
Read up on basic photo composition. 2/3s rule, and how to manage lines.
Unless you're shooting photos for insurance purposes, how you frame a shot matters. It's up to you to find a position that works in a 2D image and gives it pop.