io9 has a nice little piece about genre actors who are also fans. It's pretty cool to find out these guys are as geeked out over their shows (and sci-fi in general) as I am.
Actors: Actors Who Get Fandom
Aaron "Chief Tyrol" Douglas - geek at heart
I think Simon Pegg said it best:
We're everywhere people! And when the day comes, we will rise up from the schools and the dental practices, the police stations and the scrap yards, the hospitals and the law firms, the civil service and the erotic film industry and we will take control and we will make everyone watch the pilot episode of Battlestar Galactica and if they like it, we will provide them with all the seasons to date and if they don't like it will start them off with Lost S1. We will prevail my geeky comrades, as sure as mouse droids are scared of Wookies.
WE WILL PREVAIL!!!