I like the set and the b/w conversion - not sure about the crop though. I like the expression on #3 but the background seems a little overpowering bright to me in that framing, not ?
#1 rocks! I actually like them all. There is a quite nice subject separation in #2 even though the background is a bit busy but I have to agree with fgransee about the BG in #3. It would probably be a stronger shot if the BG was stop or two darker. Of course you would need strobes or reflectors for that.
The processing doesn't work for me on these. Too contrasty probably.
On 2, the wisp of hair on her forehead coincides with a much lighter patch of skin on one side, and a much more shadowed part on the other side of the lock moving down her face, resulting in an optical illusion that a rather large chunk of her forehead has been bleached or removed.
I think they are stunning. Good job and very classy photos. The contrasty thing is a matter of taste. I think for the feel of these photos it looks great. Nice job