The size and proportion choices, and color choices are very stunning. I love that you achieved a washed painted look digitially, but contrasted it with the more soft features of the face. It almost has a collage look about it (like a mix of photography and traditional painting), which I definately like.
The lighting on the face and hair are awesome. I love that you have shown enough of her eyes, but gave them a dark hooded look. Its both innocent and seductive to me. Her hair almost gives her a halo, and the dark wrap around her neck and shoulders remind me of a nun habit, giving it a very religious icon look, without being blatant.
The only thing I would want to see is for there to be a lighter connection between the face and the swashes of color at the bottom, to lead your eyes around the image more. Nothing too light to detract from the face however. Something like the light greens and pinks at the bottom swirling upward through the wrap at her neck.
Again I love this piece. I definately look forward to viewing more of your work!