All of these seem either too tightly cropped or not cropped tight enough for me, each as some part of the
model off the edge of the image, if you not going to show all of her I'd prefer to be tighter, or more structured in some way.
Just a general comment, I'm not sure why but your images always seem softer then I believe they should be, and #1 and #3 definitely seem to fit the soft category (at least on my monitor).
#1 Locket is distracting, composition awkward bits of legs in the background, missing part of her hair on the RHS, her arm on the LHS.
The lighting on her face and her leg help create a nice 3d shape but I don't think the composition makes the best of good lighting.
#2 LIghting and pose are ok (maybe if she was a little tiny bit more relaxed it would be even better) again its the composition that doesn't do it for me here.
#3 The lighting feels a tad flat here, there is a bit of shape on her face, but I think you can do better.
Hope I wasn't too harsh, and I'm no
model photographer to take it all with a big pinch of salt.