Do you prefer to sleep in a cold room or a warm room?

Warm. I don't like sleeping under heavy blankets or having the windows closed. It kind of makes me feel claustrophobic, and I often get too hot or too cold.

If the room is warm, I just use a thin sheet and sleep comfortably. I usually don't have too much trouble sleeping, though. I generally fall asleep so fast that I don't even remember trying to fall asleep.