Ironically, I'm wearing a pair of white Fruit of the Loom BBs today. I usually wear regular boxers, but opted for something different this morning.
I don't like BBs to be too snug, or too long. It's uncomfortable to me. A slightly roomy fit feels good, especially after you're worn them at least an hour and they loosen up a bit. They feel almost as comfortable as boxers, but look a whole lot sexier. I have colors as well as white.