In light of PTW, what's your favorite civ trait?

[monkspider]

After spending some time with PTW I can honestly say that Expansionist is now my most valued trait. I find it to be the most fun, and the head start that you get can put you in a position of considerable power for the rest of the game.
If you would have asked me a few months back what my favorite trait was, I would have said religious. Now I find playing a non-expansionist civ to be just so slow, I can barely take it.

[vmxa1]

With three of the new civs having that trait, it will be common now. I have not used one, so I have not seen the free city ala advanced tribes from civ2.