boxer briefs most of the time, but not that tight (i buy them a size up from what i'm supposed to get), they don't squeeze, so there's still enough room to be comfortable, but they stay in place so i don't get wedgies as often as when i wear boxers.
i wear a jock strap with no cup, frankly because i like the way it feels. i also eat a lot of raw meat, and in my free time i go outside and chop things down