I've only got a few hours in on Civ V, I believe. So little time these days. I don't ever think I had a favorite civilization. I would mix it up, though, and either be very militaristic or build up another area like culture lol Fun times. I can't wait to write my RTS/4x strategy litrpg books!
I've done all the victory conditions. My personal favorite is Culture and just raising money like a baller