Never liked boxer briefs. They're either tight enough on the legs that they creep up and require regular readjustment or else so loose that they don't provide the supposed support you're wearing them for. It's like the worst of both worlds.
I went to South America and forgot to pack my undergarment bag in my travel bag. Apparently, people don't believe in boxers in Argentina and Brazil and I had to sport the boxer briefs for a while. That sucked horribly.