the dramatic light accentuates the pale skin and the end-of-day kind of expression (besides, you always make a great subject for a self portrait, Sofia).
I was wondering what kind of selfie you were going to submit. Lighting is great and the catch-light in your eyes draws me in.
I only have one nitpick. It's either my screen or otherwise but following the piece of hair by your right ear, there seems to be a black vertical line which bugs me. Like I said, I don't know if it's on purpose or just the angle of which I view the photo (which after changing my perspective it disappears)..
This is very good, but I can't help but believe it could have been even better if it was processed a bit differently. The lightness of her skin renders it pale, sort of flat. Maybe a tad warmer, a bit more contrast. BW? Not sure. But still very nice image.