1/2 - Hate the term chavgrounds, seems to be the latest thing photo wise in fashion to hate regardless of why it's being used. Yes I'm not a fan of the generic mobile family studio pics but other uses for certain fashion shoots it can be used well.
Anyway with the above out the way my comments:-
1) Exposure seems good but the legs and boots have lost detail (although could be my crappy work monitor). Not a huge fan on the placement and would prefer to see a tiny bit more base shadow around the feet to prevent that floating look. Pose is good, whilst face on it doesn't make the model look wide in any way. Could possibly have a reflector to fill in the shadow on the right side of her face allowing her eyes to pop (this could be corrected PP though).
2) Again exposure seems good, would clone out the small red mark on her neck plus increase the exposure on her eyes a little to bring out the brown colour against the black pupil. Not a massive fan of visible bra straps, I'd be tempted to crop a lot tighter to remove the nearside bra strap and top of her vest.
3) I quite like this one, not sure if I would want more exposure on her eyes or leave it as is. Not liking the flowery top parts of her vest, rather than cropping (as I like the crop) you could possibly clone them out to match the netted part of the top.
4) I like the framing and look of this shoot. What I would change, place left arm behind the model as the arm is getting muddled with her top and her hand is blending against the wall (again could be this monitor). Alternatively have her elbow sticking out a little further to break it away from her torso. Clone/heal brush the branch shadow and is possible lose that harsh curved shadow line in front of her face on the wall.
5) Very nice, nothing much to fault on this.
6) Probably my fav, love the sharp high contrast BW conversion works really well with her clothing and makeup. I also like crops that intersect head/hair lines, and agree it helps draw focus to her eyes.
Anyway just my thoughts and well done on your first studio shoot.