Today I am trying out wearing drawstring-based underwear. I really like it! Since I've been fat, elastic bands always fold or roll over themselves, unless I get a size that's so big the elastic doesn't even work to hold them up. With a drawstring I can choose the exactly right fit, which is typically much less pinchy/constricting than even a moderately well-fitting pair of underwear. The big downside is that using the bathroom takes an extra 30s or so for tying/untying the drawstring (though, if using a urinal, you can of course use the fly instead).

I originally bought them because they're ~the only literally 100% cellulose-based underwear you can buy (elastic bands are made of mostly spandex/elastane) and I was curious. I think I will buy at least a few more pairs of these, and maybe start wearing them by default.