My favorite track to listen to at night is one that mimics the sound of rain on a car roof, which is oddly distinct and unusually comforting, at least to me. There's something very insular and comfortable about it, like it's raining out there but I'm nice and cozy in my little metal bubble of awesome.
This is a long-winded way of explaining why I'm sitting in my car in a parking lot watching the rain pour down while I grin like a maniac. I need to go inside and warm up for the gym .... but not yet.