Medieval 2 hands down. Civ 4 is fun, but the ALL turn-based is not really my thing. That, and it's a bit complicated for me, me stupid. Medieval is simpler and the fighting is the best. Nothing is more satisfying than breaching an enemy wall, loading them up with bowmen and peppering over a thousand troops counter attacking through narrow streets. That is, until I bring up my ribaults and cannons...