If my internet connection was better, I would play more frequently to AoE II. I used to play with the original game a lot, and recently bought the Steam edition (for the multiplayer, but still have to get the extra expansions). The same with Mythology, but I don't have the Steam version yet. I never was that fan of city builders, but I played a lot of Zoo Tycoon in the past, if that counts.
My list of games (that I can remember).
-Age of Empires I + expansions
-Age of Empires II + expansions (not the new ones on Steam)
-Age of Empires III + expansions
-Age of Mythology + expansions (not the new ones on Steam)
-Star Wars Galactic Battlegrounds + expansions
-Cossacks Napoleonic Wars
-Impossible Creatures
-Empire Earth I + expansions
-Submarine Titans (I still don't know a living person that has played this game other than me)
-Imperium II