My thoughts and comments:
Image 1: Very nice. I agree with Cinn about the jeans. I also think that the background above her head is a little fussy, and could benefit from a shallower depth of field to blur the background.
Image 2: I'm afraid doesn't really work for me. It looks a little flat on my monitor and I think it could use some levels or curves adjustment. Also I think I would prefer to see some interaction between the model and the mirror (i.e. looking into the mirror). As it is the mirror seems only to serve to show up all the background detail. Sorry, I know that others like it, and this is all about personal preference of course.
Image 3: Is my favourite. I really like the naturalness of the pose and expression. Again I think it would benefit from a shallow depth of field to remove some of the detail from the woodland in the background. This one also looks a little flat on my monitor and may also benefit from a slight levels adjustment.
I think if there is one thing I would suggest to you from looking at these 3 images it would be to think more about background detail. I think if the background does not actually contribute to the image then it should be de-emphasised using either lighting or depth of field.
These are only my personal opinions, ..... but of course those are the only ones I am qualified to offer. [img]/ubbthreads/images/graemlins/smile.gif[/img]