I Can't Sleep Without the Noise.
I've had "white noise" in the background while I slept ever since I was very very young. We've had air cleaners, humidifiers... I can't sleep without some kind of garbling sound in the background or it's too quiet. It drives me nuts. Right now in my room I actually have a fan AND an aircleaner.
Plus, when it's hot, it keeps my room nice and cool. >3