I'm probably the kind of guy you would see talk a lot, never be afraid of anyhing, and seem to never get embarassed or nervous. While I obviously get nervous and afraid at times, I pretty much never get embarassed, as I can laugh at myself as much as anyone else. Whenever I do something stupid, I consider it a great story rather than an embarassing story. So when I make everyone think I'm stupid for laughing at my own jokes, I think its just even more fun.
This obviously goes a long with me being quite confident, sometimes overly so, as it might make me seem quite arrogant. Honestly, its more because I joke with myself so much, so I can joke how I am the best that ever was, as well as joking with being too bad at being bad.