Whenever I play and Isabella always ends up being a stuck up Buddhist bitch. Whenever an AI Isabella shows up she founds Buddhism within three turns and refuses to convert for any reason at all. I was doing an Earth 18 civ game and all she has was her capital (because I was playing the Greeks and was best friends with the French, English and Germans by converting them all to Judaism so she was stuck in Iberia and way behind in technology, and she never even opened borders with France because of the different religions. xD)

I love getting a great artist and culture bombing cities near my own, getting them to join my civilization without making the leader annoyed at me. I sometimes use that new city to go to war with the civilization it came from.

Also one time barbarians took over an AI civilizations on the first turn. I was very amused and surprised when I got the message that the American civilization was destroyed so early, and later found a nice barbarian Washington DC near quite a lot of rice fields.