I'll go through these for you:
1. Nice pose, just watch for foreground objects becoming too obstructive to view. I like that it isn't such a standard pose in a standard area, good job.
2. This one, really make sure to watch limbs and something called foreshortening. This is when a limb comes towards camera and ends up looking very awkward (the legs in this case, at least in my opinion look off with this) Also her left arm is behind her back, making her look very off balance and as if she were missing said arm. I don't mind that she is looking off screen but the problem is I can barely make out her eyes.
3. Again watch things going in front of people, I'm thinking that it ran through your head but you decided it was blurry enough to ignore? Right now those ropes are cutting her body into boxy segments, not too attractive.
4. Watch the crop again, cutting off her hand. Otherwise not a bad pose, just not a fan of the 45 degree angle for this particular shot.
5. This is nice, you use the natural light to highlight your subject. This is one of your stronger ones so far, even with what some people may consider a busy background (the leaves of the tree casting shadows) Just make sure to really watch what is going on with your backgrounds.
6. This is where a reflector would help out a lot, a bit of bounce fill would have helped soothe that dark area on the bottom, and enable you to possibly bring down the exposure a bit so that the top left wouldn't be as hot.
7. This one is really nice, I would have liked to see it taken landscape though instead of portrait. I don't know what is outside of what you're showing me, but right now I feel as if she is in a tight box and a bit squished.
8. Again, nice pose and location. If possible it would have been nice if she were against a solid background instead of that harsh line break that goes up right from her feet, don't know if it would have been possible to move her a little to the right.