I have to admit, I am one of the ones who likes the temperature freakishly cold. If my room is warmer than 65 degrees I can't sleep. We keep the apartment at 68-70, and I keep my bedroom window open, even throughout winter. I figure, we save money, and if you're cold you can always put on a sweater or a blanket, or take a hot shower. When you're too hot there's not much you can do about it.