Hi there,
Composition / cropping was perfect for this image.
I also like the processing. Getting black hair to show up on a black background is an essential photographic skill that you seem to nail.
When it comes to faces everyone has a different take. Some prefer the doll / flawless skin, which I detest, some others like the "Natural Look" blotches and all. The trick is to be consistent and build your own take that can be repeated on several pics. This is why some photographers get a lot of work reproducing a specific look.
Peter Coulson is awesome at reproducing his style and gets a lot of money to reproduce it. If you haven't looked up his Youtube channel you should spend a bit of time on it.
Peter Coulson
Well done.
EDIT: I forgot to add that this image would look great in a low contrast BW image.
CHEERS
JBO