This one I think is your best work. The shading is done very well. You had clear dark spots and clear light spots which differs from a lot of your work. Most of your work just blends the lights and the darks and makes the shading look either slightly inaccurate or just too bright.

I do happen to agree with everything rahfa said from the chin to the blindfold. The hair however, is spectacular. If you would have spent as much time on the blindfold as the hair I'm certain this would be damn near perfect [other than the misplaced chin line]. Also I think her toes could have been better.

There's a few things you could have spent a little more time on and one thing that required revision but all-in-all great work. Very sexy.
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I really liked it, but mostly, i'd say i'd cut her head. I mean the problems I found are all in the upper part of the drawing.

Let me get it straight: her chin could be more fulfilled (like this pic, for example: http://tinyurl.com/8yokc3o). Also, the back part of the blindfold (more exactly at the line of her nose), in her hair, is not so good, but I don't know how it could be better.

Anyway, I loved her legs and ass. Boobs and piercing looked awesome! Arms are just as great. The only lower part that could be modified is her feet - actualy, the toes. It's pretty visible.

Overall, badass drawing!

Awesome, the lighting and shading is fantastic.

Really do like your style
Keep it up
but I would work on making some of the edges a bit more smoother like the rest of the body..

I might ask you on some D/s stuff too later :P