Beautiful
The shading and detail is absolutely gorgeous. The background added nicely to the 'in my own world' thing, but the only thing bugging me is her tattoo. Don't get me wrong, it's a beautiful rose, but it didn't quite fit the rest of the picture.
The shading and highlights made this piece of art look very realistic, but the tattoo made it look more 2D, as if it was just stamped on. Photoshop CS2 (maybe other versions of PS or other editing programs have it, I don't know.) has a 'Warp' option in the Free Transform tool, which I use for editing in tattoos. That would be my little piece of advice for you in the future. Sorry if I sound like a total jerk.. >_>;