I must have met about 90% of the TOS/TNG/DS9 main cast by now, along with some of the Voyager crew too. Most of them have perfectly nice for the 30 seconds or so that I was with them getting an autograph or whatever. One or two were a bit grumpy, but I'm willing to believe I just caught them at a bad time or whatever (especially since I've heard good things about some of the people I had bad experiences with, and heard bad things about some of the people I had good experiences with).
Appropriately enough considering it's my fave Trek series, the highest number of good-to-great experiences come from the DS9 cast. Nana Visitor is always going to have a special place in my list of faves, for being the first Trek person I ever met and for being so welcoming and friendly - forget conventions, she is just one of the nicest human beings you'll ever met in your whole entire life. As it was my first con I was a bit nervous about meeting so many of my heroes, but meeting her was like meeting an old friend and all my nerves were just gone. It really helped me feel like this convention thing was something I could do, and I'll always be grateful to her for that. A few years later I did manage to say all that to her face, and her response just confirmed everything I'd taken away from the first convention.
Rene Auberjonois, Andrew Robinson, JG Hertzler and Armin Shimerman are also right up there in my top ten of people I've met at conventions (and that's including all the non-Trek people), but the one who has really come to mean the most to me in the last few years is definitely Chase Masterson. The first time I saw her, in 2009, it was just a very brief "canIhaveyourautocanIhaveaphotokthxbai" sort of meeting as I hadn't really planned my day that well and was in a bit of a rush.
After that I really wanted to see her again, just to do it properly this time, and when it was announced she'd be at another show in 2011 she was the first person I went to see. I'd also recently found that, instead of thinking "is that it, have I seen everyone I wanted, yeah, that's it, let's go home now"
it's much better to end a convention by going to back to see your fave guest one last time and then leaving immediately after. If you're lucky enough to get another really good experience with that person then you leave on a bit of a high. And since the best person that day was easily Chase, I went back to see her one last time.
I should explain at this point that there had been something bothering me about my convention-going up to this point. I won't say what exactly because it's a bit silly, but it was something about myself, something that was lacking. But on that day it hadn't been quite so bad, especially when I was with her, and I happened to mention it when I went back to her that second time.
Her response is something I've carried with me to every convention I've been to since. And it's had an effect, the problem is gone. It was only a small silly problem, but it was there and it was real and she helped me get over it. I'm sure she'd be the first to say that it was such a small thing for her to have done, but it wasn't to me and I'll always be grateful to her for what she said.
So, yes, most of them were perfectly nice to me and I had a good time meeting them. DS9 definitely has a higher proportion of the really really nice people, but Chase is way way up there in a class of her own because in addition to being one of those really really nice people she has also had an actual measurable positive effect on my life.
Which is nice.