Briefs, wow, that was WAY to long to remember when last I wore them... probably earley school days.
I have been mainly wearing boxers after that, sometimes male gstrings.
but for the last few years it has been panties only. mostly bikini style, but occasionly g's.
I think there still is a pair of guy underwear lying in the cupboard, which might get worn maby once in a month or so, but really not that much.