I had been playing Civilization ever since the 1st game came out. Still my all time favourite. I like the fact it is a turn by turn strategy game. I don't need to have fast hands or constant attention, unlike those real time strategy games, thus more relaxing to play.
I am a fan of Civilization too, one of the main reason is I prefer turn-based games, same reason like Kelccm, I can take as much time as I like and less strenuous on my fingers and wrist.
Once I start a new game, I lose self control and continue playing till late at night. On weekends, I can play the whole day.
Used to play some very old games, like Battle of Britain, which is also turn-based. I missed those.
Nice to know others also love this epic game.
I've been playing Civ ever since the first one in my Poly days, on a 386 PC. Now 20+ years later I'm still playing Civ5. Think I've spent a grand total of more than 1 year of my life on Civ, and loving every minute of it.