So, what's the difference? I've always had the impression that Trekkies were the more casual fans. They just watch the shows and movies. And Trekkers are the serious fanatics that buy Trek stuff and post on Trek bulletin boards. If I called a huge Trek fan a Trekkie, would they be offended and correct me by stating that they were a Trekker, not a Trekkie (like in the movie Fanboys)? I wonder because I identify myself as a "nerd" but get offended if someone calls me a "geek". And am I spelling the terms right?