O.o
I'm trying to write a critique for you, but I'm having trouble. Normally, I like to say what I think you did well, and something I think could be improved, but seriously struggling to find something wrong with this one.
The soft colors, the positioning and depth-of-field, the pose, the costume design, the background, it all comes together so seamlessly. It doesn't help my conundrum that you've basically surgically strike'd me right in the personal interests with this one: beautiful and tastefully-dressed woman? Check. Heavenly background setting? Check. Angels/religious imagery? Check. Soft colors? Creative outfit? Lots of white, blue, and yellow colors? Check, check CHECK!
The only thing (and this is really a stretch for me to criticize it) I can critique is that a few of the brush stroke, most notably on the wings, look a little under-detailed and blobby, and could've done with some smoothing out.
But really? In the grand scheme of things, that's one shriveled leaf on an otherwise mighty oak tree.
Now I'm a firm believer that an artist should draw what THEY want, not what other people tell them (especially not random strangers on the internet) but if you ever feel compelled to draw and have nothing else in mind, please make something else like this.