At the risk of going further off topic (sorry OP!)...yes I have!
My wife and I met Katee Sackhoff and Tahmoh Penikett at a convention several years ago.
They were great.
Very relaxed, friendly, funny, and generous with their time. They talked about filming the show, what it was like, etc. Katee talked about almost becomiing an olympic swimmer, until a knee injury ended that idea.
They both seemed very genuine and were a delight to meet.