After 15 games, I can't remeber an AI opponent *ever* picking a side. Which makes the technologies giving you bonuses for other ethics a total waste. I've even traded a tech for lots of money to make sure they could afford it, then traded them xeno ethics. Nothing.
Anyone else ever get them to go one way or the other? They always *act* like they know (good tends to attack evil, etc) but they are always just "leaning good" or evil; they never select it.