John Stamos was very nice when I met him. He was in How to Succeed in Business Without Even Trying on Broadway and it was freezing outside that night. We waited outside the stage door for him and his car was waiting, but he signed and took pictures with every single person before he left. The people waiting for him were trying to rush him, but he stayed and gave every person his attention. Class act.
I met John Stamos when I was very very young, like 13, at some sort of car show. He was on GH then, and quite the heartthrob. We were told, along with everyone else there, that we could get on stage when it was our turn, shake hands, get autograph and picture, and move along. Well we had waited for a VERY long time and we were one of the first in line. After we got our pictures, we went down in the front of the stage waiting for our parents to pick us up and John talked to us the entire time. When it was time for us to leave, he fell down into a push-up position and gave us both a kiss!


Nicest guy ever! I will always remember how special, as an awkward young girl, that made me feel!
My husband often works with celebrities & athletes, and according to him the most kind, generous, and helpful are: Cher, Jay Leno, David Spade, and Laura Bush.
The very best of the best is Dolly Parton.
The most rude, inconsiderate, and self-absorbed are: Robin Williams, Barry Bonds, and Jennifer Lopez.
The very worst of the worst is Julia Roberts.
I would love to go out to dinner with Dolly! I love her!
That's a shame about Robin Williams, he's one of my faves.
The only major celebrity I've met is Whoopi Goldberg. Back in 1997 she was in the Broadway play "A Funny Thing Happened on the Way to the Forum." They were having some kind of charity raffle and I won. Got to go on stage for a few minutes to greet her and get the prize. She was very nice, but this was admittedly an unusual situation. I don't know how she'd be if I just ran into her on the street or a restaurant.
A few very minor cult and reality "celebrities": Edith Massey (Edie the Egg Lady from John Waters' films), Stephenie from Survivor at the county fair, some Miss America circa early 1990s at an auto show.
By the way, Whoopi, after performing 2 1/2 hours with her heavy stage makeup, looked grotesque up close.
Jim
My dad just retired from a big University here in the area and he got to meet lots of the performers that came to campus and speak. He said out of all of the years he was there, the two biggest jerks were the dude from the B-52's and Whoopi Goldberg. She actually was at a game and got mad because not enough African Americans caught T-shirts.
Here's my list:
Nicest: John Stamos, Rodney Allen Rippey (went to my HS), Richard Simmons. He is EXACTLY like you see on TV!

Oh, and Howie from Big Brother, also exactly like you see on TV
Not Nice: Rodney Rogers (bball player), Michael Buffer (let's get ready to Rumble!)