Casey I really like #1, the background and lighting work well with her skin tone. I think the image has a nice depth to it, and there is nothing I see wrong. Nice photo.
#2 is nice too, I like the darker mood of the photo and the fan works nicely for her hair. I think the orange in her skirt blends well and brings a little color without changing the mood of the photo.
#4 I like it, but I would maybe like to have a little more light on her hair from behind. I think the hair light would stop her hair from blending into the background where her part is. I like the lighting on the model, and I like this photo too. Nice work again.