Turn-based. When the game's supposed to be a simulation of an entire civilization, winning or losing shouldn't be 90% dependent on click speed.
^This... Turn based please game developers if your reading.
Same goes for RPGs, please... enough with all the lousy action rpgs.
Give us a good story like Fallout 1/2 (before 3 turned it into a action game), Planescape torment, and Baldurs Gates 1/2 and Icewind dale. Skrew the graphics, hire some decent writers instead, because the reverse just doesnt work (so many crappy games that look good (graphics wise), but have boreing story = end up lousy games).