BlackBerry Profiles

When out and about at the mall, out to dinner or just hanging out with friends, I constantly hear the ring of a BlackBerry and see any number of people grab their device to check it out. I personally use custom sounds for all of my alerts so I don't have this issue, but I know many of you just stick with the stock sounds. I like knowing my alerts are unique so I won't feel the need to check my device every time someone else's BlackBerry goes off. So our question to you is this: do you use the default sounds included on your BlackBerry or your own custom tones? If you only use the vibrate or silent profiles then you're exempt from this question, but if you use audible alerts we want to know! Leave your vote in the poll and drop a comment letting us know why you do what you do.