I am curious about this. I have posted it in the strategy forum because I am wondering if using many different civ types helps you to become a better player, thus acting as a macro-strategy in its own right. I am the sort of player who prefers to find the civilization/empire/character/whatever that suits my playing style best, and then to concentrate exclusively on that while playing. Have others here found experimenting with different civ strengths useful in understanding the game better? Does this have a measurable impact on understanding how the AI plays the game, or does it only help with understanding how human opponents might play? Any and all thoughts are welcome.