Tiny, I like quick games. Having 300 workers to micromanage and 4,000 cities to choose production (ok maybe a bit of an exagerration) makes me very bored. I like tiny random maps so I never know what's coming.
In my current PTW v1.04 Scenario I am playing the Bull's Eye Standard Map, the settling still isn't complete in 1906, there has only been a minor skirmish (civs are too far away from each other for an effective war campaign), and my turns are taking 15 mins a piece.
I dont' like taking 15 mins a turn, it makes the game so long and drawn out.