The comic shop I used to work at while I was at Uni had a signing session with Nichelle and although I had left by then I was asked to help. I ended up being Nichelles minder.
She was quite imposing, but I chatted with her during the session and although she was rather proper, I found her elegant, pleasant and friendly.
I met Leonard Nimoy who was very busy and George Takei who was a blast. I've met some later cast members - Brent Spiner is great and so was Marina Sirtis. Avery Brooks was a real gentleman as was John de Lancie, Max Grodénchik was funny as were Robert Duncan McNeill, Ethan Phillips and the wonderful Robert Picardo. Andrew Robinson was one of the nicest people I have ever met.
All in, I have to say that they have been a fantastic bunch.