First and second have major exposure issues; the right hand side (image left) of her face is nearly blown; fill light was needed to reduce the dynamic range and preserve some detail in her skin. The guy leaning against the van(?) is okay exposure-wise, but the lighting is flat, and in a word, boring. The next has potential; much better lighting, but you've got some sort of white line growing out of the top of her head, her necklace is askew, and she appears to be leaning slightly. The last one would have been much better with some fil light, and the 'square on to the camera' 'football shoulders' look is almost never flattering and certainly isn't in this case. If nothing else, go for the fail-safe formula; short lighting, bod turned 30 degrees toward the light, looking at the camera, weight on the back leg.