Hey, the longer you spend, the better it gets. Also, for people like us who tend to start making something then just find something else to do, it'd be stupid to NOT work on the same piece for ages if you finally manage to focus enough to do so.
This is absolutely beautiful. I like the wings, I adore the hair, and I really really love the sky and color choice throughout the whole thing. The wings could've probably been more dynamic looking since she's in the air and in some awesome pose and all, but since it took me ten minutes of staring to notice that, I think you can afford to do nothing about that. Also, I have no idea how to go about making them look more dynamic if you chose to remake them.. so...
Freaking well done.