When I was a young teen, I quit wearing pajamas and slept in just my briefs. This continued until I was in my mid 20s. A few times I woke up in the middle of the night with my dick aching from getting hard in my briefs. Solution? Yank the fuckers off! After a few times of waking up hard in my underwear, I began to sleep naked and never looked back. Even after I switched from briefs to boxers, I did not consider wearing boxers to bed. Doesn't matter when I sleep somewhere other than home. I won't wear anything on the bottom part of me to bed.
My apartment does not have central heat, and in the winter I often will wear a t-shirt to bed, but nothing on the lower half.