Hey, I'm wearing scooby-doo boxers right now!
The key to wearing boxers is to get ones made of heavier material... then you dont have as much, er, uh... shifting...
I'm weening myself away from briefs. Though briefs are the equivalent of a support-bra for your manhood, after a bit of getting used to, boxers are just plain more comfortable...
But again, you have to go for the heavier material boxers. Give it a go, you will switch from the "3-pack" briefs for $10 to the $12-$15 single boxers... Oh yeah, that is a downside.