Nickel! I can't believe you were saying that you're out of practice! This is, simply put, some stunning work!

First off, the line work is superb. You've included just the right amount of detail to make this work. It's detailed enough that the lace on her stockings looks realistic, yet not overly busy or cluttered. And it's very smooth; it looks like you did this with vectors (something I ought to try out, haha)!

The pose is gorgeous as well. Your sense of proportion has greatly improved (it's all that art-schoolin' I bet), and there's not any wonky looking joints/folds. It all looks very natural. I love that her curves are ever so slightly exaggerated without being over-the-top, too.

One thing that's ... I don't want to say irritating, because that's too harsh. Anyhow, the place where her right shoulder/breast meets her hair loses a little definition, mainly I think because where her arm, breast, and that one curl of hair all meet at one point. Try spreading them out a little (or thickening the lines where overlaps occur). You gotta watch out for tangential lines. I should know, I catch myself doing it all the freaking time.

Overall though, like I said before, just fantastic work, love. Keep it up, you've really got something going for you here.