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Personally, I find #2 to be awkward. While I'm not sure what she is doing with either hand, her left one is particularly curious.
Also in 2, the latex looks a bit baggy around her right ankle, which kind of flies in the face of what latex should be. Some wrinkles are OK, but just look at the difference between her two calves in that shot. One is curvy, the other lumpy.
I am sure latex is a huge learning curve, and I have no first hand experience. But I would say watch where the wrinkles land. Some of them are perfect, and add to the texture of the clothing. But others, like in number 4, on her left leg, just above her knee, I think would look better pulled flat. In contrast, the wrinkles in this same shot around her ankles are nice.
Number 5 is a torso. I would like to see the same shot with hands on the hips perhaps.
Generally I find the dark background to be a bit much with the dark outfit. I think the ones with the white background work much better.