I am one of those people who wears plain underwear. White. Cotton. No lace. My main goal is comfort. My main complaint about underwear? BUYING IT!
I hate the fact that my DH has been wearing the same size and brand of underwear since he was in the ninth grade. The underwear hasn't changed at all during those ensuing years. It probably hasn't changed in the last 100 years. He needs new underwear? He goes to the nearest department store and buys three packages of his usual brand and he's set!
When I need new underwear, I must go on a search and destroy mission to find some. Usually, what I bought last time is no longer made, or it has been "new and improved" to the point where it is no longer comfortable for me. So, then I must go to way too many stores and search the internet, buying many, many brands/sizes to find comfort and fit.
And of course, you usually can't buy just one pair. You have to buy a package of underwear. I end up sending a bunch of packages of brand-new underwear to the Goodwill store with one pair removed from each package. But once I do find "the perfect fit," I buy enough to last me six or seven years. That way, I only have to go through this on occasion. Maybe I should learn to sew my own. Yeah, right.
And I won't even begin to discuss finding a bra that fits and is comfortable; I could write a novel. And isn't the phrase "comfortable bra" an oxymoron anyway?