Me too. Civ is the only game I have installed on my home machine (everything else is on the Wii). Been playing it since I was a Uni student back in the early 90's.
I love this game, though I would say that it took me a while to like Civ IV as much as I liked I and III. I imagine I'll be buying V when it comes out too. Sid rocks. Anyone remember the game Colonization? That was cool too.