~+About the art+~ Hm...its like 2:25 in the morn. I'm crazy. XD but I love this piece of work. I had so much fun coloring the dress. The hair was like an experiment, but it turned out ok. I wanted to make this piece of art as a gift for someone, but there's too many people I want to give it to, so I guess I'm giving this to EVERYONE. XD no stealing tho. >_>
In terms of anatomy, this is nearly perfect; the only "ifs" would be her face/head; you see, the way her hair flows indicates a certain skull direction, which is not the same for her eyes, nose and mouth (basically, it's not perfectly lined up). However, this is hardly noticeable, lest a person looks closely. The real "problem" would be her feet, which look a bit "weird". I think it's because of her fingers, which look a bit small, and the lack of more shadows to help comprehend how the foot links to her leg.
The color job and lighting are awesome; the colors blend perfectly into each other, and you did a great work on the dress' folds. I would only recommend having tried different between her hair and the bigger wings (and perhaps even the smaller ones); the way it is, one must full-view and pay some attention in order to fully discern what is what.
As for the backgroun, I think it looks good. It works with the character, and gives it a certain aura. However, I think you could've risked something else, perhaps still on the aura subject, but with colors that would make her shine (lighter colors, perhaps even yellows). It would empower your work even more.
Either way, I think this looks awesome The angel looks very graceful, and the colors make her look light and pretty much as good as you expect an angel to be. 8/10