i always found BBs uncomfortable. too tight around thighs. i like briefs, like hanes or fruit of the loom, preferably "fashion" briefs that are not too low cut. bikini briefs are just plain uncomfortable since i have, well, kinda big ba..s.
i like to sleep in cotton boxers. they call them "sleeping shorts" at Target.
i've tried boxer briefs. don't like the way they hug. i wore tighty whiteys for 18 years and then switched to boxers. i can never go back now. just too comfortable in boxers.
i do have a few pairs of boxer briefs laying around somewhere, but i'd rather go commando than wear them, and i have recently as i havn't been keeping up on laundry as much as i should be.