I met Gerard Way at a Wal-Mart before. He was buying candels and then a week later I heard he was engaged to his wife, so that was pretty interesting. :)
You lucky son of a mother duck... The only famous people I have met are Escape the Fate (because it was a present for my friends birthday because she likes them) and Citizen Erased (they changed their name to Seven Year Riot about a week ago, so I was pissed that I had bought a dog tag and hat that said their name) and for both of them it was just at concert autograph booths.