Of the last two, the crop is off
slightly IMO. Both having the edge of the frame right on her breast, where the nipple would be, is bugging me. In my mind, it is similar to cropping at a joint. If you have more room in the original file, I would suggest having a play with them...... I'm only suggesting the images in this instance.
For the last photo, the blades of grass in front of her hair is okay, but I would try to remove them from her neck and forehead. One little trick to have up your sleeve is to keep a pair of scissors in the car if you're going on an outdoor shoot so that you can clip these sorts of stuff by looking through the viewfinder carefully before triggering the shutter. Lastly, next time consider having her bend her elbow and bringing to the back of the head. This will help create a more interesting line than just an arm extending to nowhere.
Just my 2¢. Pretty girl. Thanks for sharing.
EDIT:
Here's an example of bending the arm to create a more interesting line. Look at the second photo. (The OP suggests this is NSFW)
Model Alicia cc welcome (nsfw sort of)