Well... it depends on the civ I'm playing, my objectives in this game, if any, the number of opponents, and the speed of the game, where I find myself planted in the map, what opponents I have close by, and other things too....
Often my tactics will change during a game depending on how it's going.
So there can be no true answer to your poll for my style of play, as I tend to do things a bit differently every game, I find that more interesting, especially if you play random civs and maps.