I almost always play random maps, usually NOT little islands (can't spell archapelego!) or panagea (probably got that one wrong too). Anyway I'm sure you all know what I mean.
I like the not knowing and the discovering, and racing to grab the unkown/about to become known.
I usually image the civs are each based on a surviving escape pod of a different ethnic group, abandoning an insterstellar colony ship thas come to grief around another star, all coming down to random locations on the planet, but each without enough people or equipment to maintain high technology, and reverting to barbarism. Slowing clawing their way back up. Of course, its a bad drop, they loose writing, the alphabet ... and a lot of other pretty basic stuff ... just about everything! But its really tough when your stranded on a hostle planet ... I image they mostly die off in the first generation or two, and the game picks up maybe 10 generations after the crash ...
Of course the fun thing is to image the spaceship is to head back and find Earth ...
Yep, I usually play out till I am either killed off or its obvious I am about to be. Or have better luck!
I wish we could vary the nature of the planets environment a LOT more, and in more precise ways. :alien: Unfortunately, I just don't have the patience to design a map myself; it seems like just an overwhelming amount of work.

Not to mention knowing where everything is. I wish more people would post maps; perhaps a real "map exchange" to pull maps from, it would be like random ones in that you do not know where stuff is, but other people (then me!) have put in the effort to design in neat features.
Ah, if wishes were horses ...