There are so many out there who think that directional lighting makes it art. This deviation should be used as an example of light and shade, of how to paint with light, and finally, how to pose. There are few works that I find perfect but this is one of them.
I find your use of light and shadow very effective, as it shows a face in calm repose even as the rest of the body is in motion or tension. I like the draped nature of the model's cape (or whatever you might term it.) Thanks for sharing your work. Please share my thanks with your model.