I'm going to give Doctor Sam Beckett the thumbs up as well!!!
My best experiences were with him, Nana Visitor with her beautiful smile, cheeky Cirroc Lofton and wonderful Kate Mulgrew (superb hair)!
By far the least impressive was Mister Shatner. Sat there on his chair, waiting for all and sundry to come and see him. I could go further with my opinion, but I won't.
In fact, out of the fourteen people I met, I have nothing but lovely memories from almost all of them.
Andy