It varies.
Naked most of the time, pyjama bottoms when I’m having my period (particularly the first couple days with heavier flow), and full pyjamas when I’m alone (when husband is out of town, and I don’t really know why, it just makes me feel safer, and warmer!) I prefer naked, though.
Nothin’.
Rarely, when it’s really chilly, I’ll start out in jammies, but they’re usually gone after a few hours.
I get tangled in them!
Wife and I are both always naked, except she wears panties during her period. I’ve been sleeping naked since I left college and no longer had a roommate- about since I was 21. That’s… 21 years.
If I try to wear boxers and/or a t-shirt, or pajama pants, I get so twisted up and uncomfortable I end up ripping them off. I keep my robe hanging from the back of the door so if I have to jump up in the middle of the night for any reason, I can throw it on.
I get insomnia a lot, and in the nice weather I’ll get up out of bed late at night and go downstairs, or maybe sit out on the back deck with a glass of wine, and never bother to put anything on. I can’t see any other houses from my backyard and it’s a really nice feeling to be outside, gazing up at the sky, totally naked.
Generally boxers. If it’s really cold I’ll add a t-shirt; if it’s really hot I’ll lose the boxers.
Naked. Middle of the night sex is easier that way.
I wear old tank tops that are too thin or faded/old or whatnot for every day usage on top and on the bottom pj pants or shorts, depending on the weather. Very comfortable!
I’ve never been able to get comfortable naked. Even when it’s warm enough. It just feels weird. Maybe because I’ve spent more time living in a house with people so it makes sense to put something on just in case?
I never wear underwear, though. Unless I’m on my period or something and I’m wearing a pad, though usually I’ve got a tampon in. I like to let it breathe.
Wife beater and panties. Naked just scares the dogs!
Tank top and shorts of the flimsiest material in summer. T-shirt and coordinating flannel p.j. bottoms in winter (sweatshirt in the coldest weather). I don’t like wearing pajamas, I always flash back to when I was home from school, sick, as a child (can almost smell the Vicks). All those comfy or pretty or sexy nightgowns end up wound around my neck! They look nice but are not comfortable .
Underwear during summer, fall, and spring. Underwear and shirt during winter
Nothing spring through fall, but a (knee-length) nightgown in the winter, because I turn the heat way down at night and it’s really freakin’ cold getting out of my nice cozy bed starkers in a 60 degree room.
Usually just my boxers. If I get cold I might put on a shirt, but that is very rare.
Sometimes naked, sometimes just panties, sometimes yoga pants and a fitted tee shirt. It just depends on what I feel like at bedtime.
Pajama bottoms and a t-shirt usually. If I get hot, the t-shirt comes off.
Yoga pants and a tank top.
I used to sleep naked, and then I moved into a street-level apartment, so I started wearing a shirt and panties. And now we have a housemate, so I wear pants, too.
Besides, we have a little one, and I’m quite often up in the night. It’s warmer this way.
I’m really surprised that Naked has received a plurality of the votes. When Mrs. Homie and I moved in together she was shocked that I slept in the buff. She thought it was about the weirdest thing she’d ever heard of!
Good grief. Who still wears pajamas? What is this, 1926?
heh, we’re a bunch of nudies here. 
Naked in the summer. T-shirt and pajama bottoms in the winter.
Usually naked. Not always, but usually. I used to have those “what if there’s a fire???” fears, but it didn’t take me long to get over it. The strange thing is that I own literally dozens of sets of pajamas, which are my standard around-the-house gear.
Boxers in the summer. Pajama bottoms in the winter. This house is a little chilly, though, and I may upgrade to a T-shirt as well before the year’s out.
I’ve always lived with women, so naked was less-than-ideal when going down the hall at night for a pee. Now it just feels weird to sleep naked, unless there’s someone naked right next to me.