Nice work here!
Number 1 works for me. It is up close and personal. You establish a connection with the subject right away (maybe because the cropping brings you into what normally would be her personal space. I think that sometimes we tend to fall into ruts created by dragging heavy fixed rules around about cropping and off centered images. Way to shake it up a bit a bring some fresh light to the table.
Number 4 offers an interesting balance and draws you in. She has a whole world to the right of her ready to explore, yet she seems to be waiting for something or someone. I love the way the shot slides out of foucus as you stray from the subject. This has a nice way of guiding you back to the subject gently with out feeling confinded. I love the story you can form between the lines - makes the picture interesting.
Number 5 (even though it is the same shot as above) didn't grab me. It looks more sepia tone than black & white. I generally prefer sepia tone for very old photography style arrangements or old style western shots. If the subject and scene are too new, or does not play up to texture and contrast, I tend to stay with colour, otherwise it can come across like some of the life or energy has been bled from the shot.
Very enjoyable