excellent use of light... and spacing. i like them though it's easier to find things that i'd criticize if it my work... since you asked i'll offer it!
#1 i'd like the face to be sharper, it would "attract me more
#2 the window is growing out of her chin
#3 is excellent, my favorite... i get real emotion and connection/cooperation between photographer and model in creating something
#4 that sharpness again. i might even increase the contrast and moving the model back and using the tire tracks.
keep going, wish i'd done them!