I think one of the reasons you don't like the lighting is because the only light you can see is coming from behind, rather than the light that is actually casting the shadows that is out of "camera" on the ceiling to the top right. Also, it's the same colour as the window light so it seems to you to be the wrong shadows, even though it needs this lighting or it would probably be too shadowed like a photo shot toward the sun.
HAHA! We're our own worst critic. But that's how we grow and learn. Well, I like it I don't care what you say!
I have stories about doing some of the worst art ever, just being depressed it was in print, and getting the most positive feedback from it like it was the best thing I've ever done or something. I still don't understand it.
It's a weird thing. Usually, I know when something is working or not. This one felt cheap to me, for some reason, but I'll take the compliment. We've gotta hang out sometime. I'd love to trade stories and tips.