I'm not afraid of the dark, I'm afraid of silence.
Actually, I'm not afraid of silence, but it bothers me. It makes the smallest of detectable sounds the most annoying thing in the world! It's like that annoy-a-tron thing... you're just laying there waiting for the next sound to happen, and when it does you flip out because you're just trying to sleep. But the concentration on such things keeps you awake even longer. At least, that happens to me.
As for light, I enjoyed sleeping with a nightlight at home in my room (I don't have a TV in my room at home). I'm prone to waking up in the middle of the night all of the time, and there's something comforting about having the nightlight on instead of just opening your eyes to pitch black going "WTF!"
I suppose people wonder what my roommates thought about the ambient noises thing. Well to be honest, most of them fell asleep long after I did, especially my roommate last year. I go to bed around 11:00 most of the time, and they are up until like 2:00. They have later classes so they can do it. You know what most of spring semester last year consisted of? Me falling asleep to my roommate playing Call of Duty. And I'm talking lights on, surround sound, him yelling in the headset... this is all music to my ears. I told him that I don't mind and he took advantage of it. To quote Fight Club: "Babies don't sleep this well."
I don't know why I like it, I just do.

Comment