I love the masculine touch with the collared, button-down shirt. Most of your models seem to wear only very feminine clothing (lingerie xD), so I especially appreciate how you tease the viewer in this one by hiding her breasts. I also like the way the silver in her eyes and make-up lead us down to the piercing in her navel. It's such a striking photo; good job!
The only thing that distracts for me is the slight issue of her skin texture on her neck. She has such smooth skin on her face that when we reach the neck she has a slight bit of "alligator skin" that almost seems to make the head seem disconnected. It draws my eyes away from all the lovely aspects of this shot--the composition, the lighting, etc.--and holds my eye too long.