Most Helpful Guy
I met Patrick Stewart once. I was doing inventory at a Tower Records (remember those?) and he came in looking for a version of the Brandenberg Concerti.
He was awesome. Very polite. Very affable. I temporary blanked on his name and actually called him "Captain." He responded as though I had made no mistake.
I met a few astronauts. They're not generally very famous, but they're interesting people. I met astronaut Dave Scott while selling him a leather jacket. He was as shocked that someone knew who he was as I was for meeting him. He paid with a NASA federal credit union VISA, and that's how I knew who he was. Ironically, the VISA had a picture of him on it saluting the flat on the moon.