Two thoughts after some play so far (~80 turns in my most recent game; a couple of ~50 turn whistle-whetters to get a feel for a couple of civs) (1) If you want to get a feel for the religion mechanic, I recommend to a beginner of Gods & Kings to consider strongly using Boudicca. If not, then consider Pottery as your first tech so you can build an early Shrine, and go for Stonehenge's tech & wonder (which now gives +5 faith). Religion has been fairly well fleshed out so far in what I've seen in reviews (although I'm still early on...just founded a religion with Boudicca in around 2000 BC -- like I said, use Boudicca if you are new to G&K and want to mess with religion early!) (2) City-States: REALLY loving the changes here! More variety, AND more quests! Some of the quests have a time limit, too. A couple of things that I didn't see well-documented pre-release are: (2a) You can now demand tribute from City-States. You do get some indication before-hand whether they fear your military or not -- presumably the more they fear your military, the more likely they are to give in to your demands...although I haven't actually tried this option myself. But, see (2b) for play balancing--- (2b) When you (or the AI) demand tribute from City-States, two negative effects happen: First, all other civs are notified that you demanded tribute from a City-State (I don't know if there is a negative diplo modifier yet). Second, the form of the notification is as a special "Quest" for everyone who did not demand tribute, to potentially gain extra influence in an easier manner if they are the first to respond! Also, for aesthetics, I really like the City-State quick-look bar a lot better the way it is now. In my game, the Chinese demanded tribute fairly early on from not one, but TWO different City-States, relatively close to each other. Immediately after, the City-States each issued special quests. The first said (paraphrased) they would give extra influence for a gold payment to rebuild the economy from the Chinese demanding tribute. The second said (paraphrased) they would give extra influence for someone to declare they would protect the City-State from aggression. (There is a minimum time of 10 turns if you grant protection.) That was a pleasant surprise addition to the City-States! Now, back to G&K for Just...One...More...Turn!