I've been fortunate to have so many good ones in my life, but I also cherish each experience because (like many on here) I'm wise enough to know that this is a nice bonus experience and nobody is obligated to do anything beyond their performance. The five that stick out for me (out of well over 100 shows) the most are HEAD OVER HEELS, HELLO, DOLLY, and SIX DEGREES OF SEPARATION.
HEAD OVER HEELS - Probably the best stage-door experience currently on Broadway. Both times I've seen it, nearly the entire cast (Rachel York was the holdout each time, but that's her prerogative) came out. They were all conversational and friendly to the fairly sparse crowd (no more than 20-30 people) and moved down the line with ease and precision, but took time with each person and were just effusively thankful we came to see the show. Peppermint is such a friggin' sweetheart and knows her fanbase well and was just full of love and gratitude each time. The second time I went, she spent a good 2-3 minutes teaching this 50-something year old woman how to selfie since she was getting the Playbill signed for her daughter (who was unable to go), and it was so amusing and also cute to watch.
HELLO, DOLLY - I only did it the first and third times I went, and both times, Gavin Creel and Kate Baldwin were just the greatest people I ever met. The third time, I had gone with my aunt from Indiana who had never seen a Broadway show or been to NYC in over 50 years, and he wrote "Welcome to Broadway!" on her Playbill. It warmed my heart so much. Also, Donna Murphy was my first Dolly, and she was very appreciative and a little taken aback that she had so many people waiting for her (it was one of her first performances) and she took her time with everyone.
SIX DEGREES OF SEPARATION - This one wasn't a busy stage door at all, but Allison Janney was so sweet (since I had been a fan of hers since "9 to 5", but wasn't able to meet her then), Corey Hawkins formally introduced himself to everyone with a handshake and a smile, and John Benjamin Hickey came out last (when there was about three of us left) and we talked at length about the play, and also his experience with THE NORMAL HEART, and it felt like I was talking to a great friend.
Special mention to every time I've stage doored at MTC-Friedman. The crowd is always small, and the actors are almost always the friendliest because of it. In one year, I met Tyne Daly, Sierra Boggess, Nina Arianda, Hugh Dancy, Cynthia Nixon, John Lithgow, and Laurie Metcalf at that door and each one was a gem.
WORST: It's not exactly a horror story, but during Nick Jonas' run of H2$, the crowd was almost unmanageable and actually swayed toward him as he walked down the barricade (and I'm a hard guy to move in a crowd), though everyone did get their autograph from him.
Check out my eBay page for sales on Playbills!!
www.ebay.com/usr/missvirginiahamm