I feel like I'm one of the few who really enjoys wearing Pajamas at night. Thankfully my lady-friend doesn't mind. I have lots of different kinds, too. Warm ones, thin ones, nice-looking ones, hideous ones, plad ones, polka-dot ones, ones with elastic straps and ones without, ones with holes. You could write a Dr. Seuss book out of all of the different kinds.
They've got to be clean, too. If I've run out of clean pajamas, I'll also wear athletic shorts to bed. I only wear nothing but boxers if I have no other option, or if I'm too sleepy and already on the bed or couch.