I really like #1.. Not sure about the texture of the background but that's not a deal killer cause she's in a funky pose and outfit... so it goes well together.
#2 - I really like the idea. something seems just a touch off and I can't figure out what. I'd definitely get rid of the white blobs over her shoulder
#3 - I'm not sure the intent for this image but my least favorite of the ones posted. I think the head angle, hair and shadows make her face seem more full. Maybe the blue gelled kicker is giving confusing color issues or something but I think the color seems a bit off.
#4 - well... I really like this image. I think it's the location with the B&W and the subject fits well. Composition is very strong and I think the logo on the pole (or whatever) works well.
So 1 and 4 are my favs.
Please don't stop posting pictures..... I enjoy your work.