Speak for yourself, sure I'm not alone in this but I can't stand pyjamas. Often they have buttons which are uncomfortable (for front sleepers, which try as I might, I often find myself waking up from this position), and they seem to get all twisted round my nutsack and bunched up in my butt. Not to mention, too hot!
I like being a birthday suit ice popsicle when sleeping, otherwise I wake up in a pool of sweat and have bad dreams. I'm sure I read a study recently that found optimum temp for a good nights sleep isn't a hot or even warm temp.
The absolute worst feeling in the world is waking up soaked in sweat because it's slightly too hot, then adjusting the AC, but now you're freezing cold because you're literally soaked and being blasted with cold air. And the rest of the night is spent alternating between being uncomfortably hot, and uncomfortably cold.
At that point you might as well just accept the fact that you're not gonna get a good night's sleep that night.