common themes and geekery

I watched Doctor Who with some friends last night. I'd never seen the show before. I talked over a scene to offer an opinion on something happening (I'm sure my comment was something like, "So… it's always the Daleks, isn't it?") and one of my friends said, "You are now a geek." To which I said, "Uh, have we met before?" I feel like I'm already pretty secure in my geekhood.

Everyone's a little nerdy about something. The things that I'm nerdy about, that I obsess over, tend to find their way i...