I really, really like backgrounds. When I start a drawing, I usually visualize the background first and then draw the character/s. Lighting, textures, the floor, the sky, the walls- I enjoy trying to get the "feel" I visualized when I imagined the drawing. The scale of the drawing and the size when you scroll down to see it are very important to me too.
Even before, when I posted my very first drawings here in deviantart and when I started drawing, the background was always on my mind. I just couldn't make them the way I wanted them to look like. Not that I'm some kind of artistic genius now, not at all, but I think I've gotten a little bit