I've met and played in tournaments against most American GMs. There are a few I know well or am friends with. I've met and played a few legendary Soviet GMs and a few of the current super-GMs. If anyone is curious about someone in particular, feel free to ask. If I don't know the person you ask about, I'll be honest and say so. Obviously there are many I haven't met.
Chud, I'm afraid of approaching masters, let alone GMs. For some reason, I think they probably hold patzers like me in contempt. Rational or irrational fear?
Judit Polgar!Really!