Hmmm...
He's not a "big celebrity", but he means a lot to me. I would have to say Nils Lofgren is the "nicest", though I was also able to spend the most quiet time with him, and I have yet to meet a celebrity that isn't "nice". I have met some that weren't
extraordinarily friendly, by I don't care about that too much. Nils signed gobs of LPs, etc for me while we chatted, and he was
very sweet and genuine. I went to a show in Portland and told him I was so sad because I was not going to be able to go to the show the following night in Seattle because it was a 21-and-over venue (I was 17 at the time). Well, I managed to sneak into the place in the afternoon and hide in a bathroom stall for a few hours (the soundcheck sounded amazing from in there!) until the show started. When he saw me after the show, he gave me a big hug and said, "You made it!"
Debbie Harry and Chris Cornell are nice but very quiet. If you encounter either of them, don't expect a long-winded conversation! (Chris Stein is chatty, though, and told us we had to "shove stuff in Debbie's face if we want her to sign it"
.)
Paul, Linda, and Heather Mills McCartney: nice as can be.
Very friendly.
Timothy B. Schmit (Eagles): SO sweet. I had the chance to go to a guitar store appearance in Cali, which was really neat. He answered questions, took photos and signed autographs. He was just a genuinely nice guy who loves music. There was a young boy there who had drawn a picture of Timothy for him and Timothy held it up for everyone to see and got very excited. He was also very appreciative and surprised that I knew all of his work (solo, w/Poco, etc).
I can't think of anyone else at the moment. Still hoping that FM meeting day will come.......