Why is it when I actually try to reach out to find people who I want to chat with over a specific topic, as in talk shop, there are never people around that I can talk to?

Like, seriously. I can't find anyone who's a massive nerd for Disgaea, Plants vs Zombies, or even more recently, Medievil, Elder Scrolls, and other things of the like. I suppose I'm not looking as hard as I probably could, but it bothers me when I want to talk about something and at the same time have to explain it to people who know nothing about it because I can't find anyone with a nerd-level knowledge on it to talk shop with.