Just for fun (and with the recent addition of a new celebrity autograph), I thought I'd make a list of my celebrity sightings and the impressions I had of them.
When I worked at a doctor's office in high school, we had a celebrity patient: Charles Grodin (of Beethoven fame). I remember the one time I saw him at the office he wore a hat and dark glasses. But he looked at me and cheerfully said, "Hello!" He seemed like a nice man.
At a college visit in Chicago, my friend and I spotted Jessica Simpson and Nick Lachey walking arm in arm at the airport. They were in sweats and looked so happy together! And they seemed fine to talk to fans when they were approached.
At another trip to the airport, my husband and I saw Hank Azaria. He was talking cheerfully to fans, so I felt I had to approach him. I asked him for his autograph and asked if he would do a voice. So he said something to me as Moe (from The Simpsons). He was so friendly!
On my honeymoon in Hawaii, my husband and I spotted Mike Meyers (Austin Powers, Shrek) on the Hana Highway in Maui. He did not look like he wanted to be approached or even recognized.
On a flight from Germany, my husband and I saw Maggie Gyllenhaal (The Dark Knight) in first class. She seemed very friendly as well, although I didn't get a chance to approach her.
And finally, on a recent trip to NYC, my friends and I saw Rachel Dratch (Saturday Night Live's "Debbie Downer"). My friends had seen her before me, and mentioned it to me. I started spouting about how I would have approached her if I had seen her. So then we saw her again, so I had to live up to my word! She was with her family and was not immediately accessible, so I hung around near her, feeling awkward. Finally, she saw me so I asked for her autograph. She was perfectly sweet and asked for my name. I told her and gave a few compliments. It was fun to meet her!
I think that's a complete list. Not too bad, huh? Airports seem the way to go if you want to spot celebrities. Although, Los Angeles might be an even better bet.