Did you use a pop up flash on the first one? It seem the light is a bit too flat and strong on her face. I know it's intentional but I'm not sure if I like the fact that she's out of focus, perhaps it would work better if the composition wasn't so tight. I like the lighting in second but again, the compostion is a little tight, perhaps a 4x5 ratio would have been better than 3:2 that you're using. I don't really like the lighting on the one, it's seem to be a little bit under expose or perhaps the natural light wasn't that good. The background is kinda not helping either. I like the 4th one, good lighting and good compostion too. These are just my opinions, I hope it help.