As I said in the First Civ Fail thread, I started playing during the summer between my senior year of High School and freshman year of College (way back in 1992). I was sleeping over my cousins house and he showed Civ 1 to me. I immediately fell in love with it and I started playing it like a fanatic. I loved to explore, but I never built any buildings in my capital because of the maintenance costs.
I kept running into problems with all the barbs popping up from the shadows, and I never got very far in any of my games. One day I figured Id go ahead and build some buildings, economy be damned. It was then that I realized how to properly play the game and I started winning finally. I loved Civ 2, I liked Civ 3, I didnt care for Civ 4 very much, and I was apprehensive at first about Civ 5 because of all the dramatic changes.
But I have to say that Civ 5 is my favorite version so far. Its the first version that I finally dared to play above the lowest level, and Id been consistently winning on Prince, with about a 50% win rate on King in G&K. I even won an Emperor game once, but Ive dropped back down to Warlord with BNW until I fully grasp the new mechanics. Then Ill work my way back up the ladder.