I was once able to go to a panel that Hideo Kojima was holding. It was really cool hearing his thoughts on game design and the like. Unfortunately I'm in the midwest so I can't go to this, but I look forward to hearing about what he says.
Yea, I haven't really had any experiences like that. The closest would probably be having Jason Rubin (co-founder of naughty dog) coming to speak at my game development club. We also get various speakers from other companies. Mostly from Blizzard and Obsidian, since they are the closest.