madscientist
RPC Supergenius
I would agree that AI choices are a lot harder to read in most cases, but there still seems to be more to it than a "roll of the dice". It seems like each different game, the civs around me have developed a "style" that seemed to depend on both randomness and who the civ was.
A few examples from my experience: a game with Catherine who definitely seemed like a die-hard militaristic do-gooder, who hated France for warmongering, and liked me until the day I attacked an innocent city-state, at which point she seemed to try to stop me, rather than conquer me. Siam played a friendly role, and routinely refused to get involved in any conflict, while attempting to ruffle as few feathers as possible. Alexander seemed cocky, hurling taunts my direction early on, but rarely proving that he had anything to back it up. The Aztecs and the Americans got into an interesting circle of betrayal with me, where, apparently, everyone made pacts of secrecy with each other, yet played nice, did a few research agreements and such, but not TOO nice, denying me vital resources, in spite of them having excess, eventually resulting in us taking turns picking on whoever happened to be "the little guy" at that moment. Lastly, the most interesting example I found, Ghandi, who, in spite of being at a rediculous disadvantage, seemed steadfast in protecting his honor, quietly accepting my dominance in the world with occasional "You shouldn't be doing that" statements, but, appropriately, non-violent resistance. His willingness to help me seemed to directly relate to how much trouble I had been causing, and even as I drove mech infantry over his pikemen and razed everything but his capitol, he refused to enter a peace deal that would reward me for what I did, and held tight to the silver mines that attracted me to his shores in the first place.
Perhaps my experiences are just random, themselves, but I think what fraxis at least TRIED to do was simulate the idea of other "players" in the game, ones who backstabbed, held grudges, made friends, and most of all, tried to win. The "obvious" diplomacy of Civ 4 (+1 you gave me a cookie, -3 you stole my dog) seems to have shifted to the NPC-style city-states. I'm not sure if this is better or worse, myself. I like the idea of life-like opponents, but I do like to have a good grasp of the world around me and, in the right situation, manipulate someone by means other than a sword at their throat.
Actually this is an encouraging summary and would fit in with what we were promised, an AI that usually but not always acted in predictable manners. Perhaps I need to just see how the AI diplomacy goes and treat City-States like the old Civ IV. Alas though, I do miss the Moronic Monty, Zealotish Isabella, and backstabbing Cathy.