Besides what's been said, her body position in #3 is pulling me out of the frame. I'm all in favor of breaking the "rules", and I don't mind a subject's body being angled toward the edge of the frame rather than the center of the frame as long as her head/eyes lead you back toward the middle of the frame. Here she's looking straight at the camera, so I get the feeling some gnomes are pulling her through the bottom right corner of the shot and she's watching you waiting for you to help.
I do like the composition of #1, though I'd recommend a bit less dead space over her head. And I like the composition of #2, though here I'd leave more headroom. I don't have as much of a problem with chopping off the top of people's heads as some viewers do, but to me that's much more appropriate to do in a studio shot than outdoors, where the rest of the scene is clearly open and airy.