I've met too many to list.
Living in & around New Jersey, I run into Kevin Smith and all his crew almost weekly. Jay, Steve-Dave, Walt Flannigan, the guy with his hand caught in the Pringles can, etc. The funny thing is people in NJ can't stant Kevin Smith. We know what an ass he is, only outside NJ is he "famous".
I've also run into Bruce Springsteen & Bon Jovi many times.
Once, while taking computer classes in NYC, I was stuck in an elevator with Mike Bloomberg (while he was running for office, before he was mayor). It was really cool.
I was taking night courses for computers at CUNY across from the Empire State Bulding, and when I was leaving Bloomberg was there. There was some kind of political thing going on. I got into an elevator with Bloomberg and his advisors, 2 NYC policemen, and some other people.
This demonstator in an enviormental suit tried storming the elevator and asking Bloomberg what his position was on illegal ocean dumping or something stupid. The policemen handled the whacko off the elevator, but there was still too many people on the elevator (it wouldn't work) so more of his aides got off, it still wouldn't work, so the last of Bloomberg's crew got off (he seemed uncomfortable) and the 2 of us rode the elevator to street level. He turned to me and apologized for delaying me (which I thought was really cool) and I told him it was no problem. It was just odd but kinda cool, the two of us alone for that 15 seconds, two people from such different worlds.