I really want rare random events to do this i.e.
A traitor from (civ) was found in your midst, planning to starta fire in Cahir Abbey.
1. Pardon the traitor but send him from your lands.(+2 with civ and alignment to good)
2. Make an example of the traitor. Kill him, but humanley.(Change to neutral)
3.Kill the traitor and nail his head to the gates of the city. (-2 with civ, change alignment to evil.
Naturally, leaders should be slanted towards certain choices.
Good idea. But, IMHO, there should be a certain weight to the "natural" choice. You wouldn't lose or gain anything for an "unnatural" choice, simply change alignment. But the choice for your own alignment would give a bonus. Sort of a non-religious conversion, if you want the benefits of that alignment more then what you'd get for your "natural" choice. Feel free to steal my ideas, modifying them as you see fit. I'd be honored.
A good civ might be presented with:
A traitor was found planning to start a revolution. Many of his complaints are legitimate, but he also speaks of the wholesale slaughter of "the unclean." Specifically, most of the middle and upper classes of our civilization.
1. The greatest strength is mercy; pardon him, and address his legitimate grievances. (Happiness bonus)
2. We understand his grievances, but he is clearly a madman. Execute him, and those found plotting with him. (Change to neutral.)
3. Let's show him just how "unclean" we are. Publicly execute him. Then kill all those plotting with him, and just for good luck, kill his family. Oh, and start an inquisition to see such people don't show up again. (Change to evil.)
For an evil civ:
A wandering prophet has been found in our lands. He has been preaching that all, even the most evil, can be forgiven their crimes. He says, if you will hear about him and his way of peace, he will see that the gods forgive your sins. While he has converted every assassin sent to kill him, those around him whisper that he has a weakness for beautiful women. We may be able to use to our advantage.
1. Really? Make amends with the gods? Perhaps there's been enough bloodshed. Send him to me. (Change to good.)
2. Don't waste any more assassins. Let the fool preach to my people if he must, but tell him to begone if he comes knocking. (Change to neutral.)
3. Don't we have some beautiful women to spare? Show him the rewards of the dark side. Perhaps he'll stop wandering if he knows where to find our finest loose women. (Free Great Prophet specialist your capital.)
For a neutral civ:
We have discovered an ancient artifact near (City name). It is unnaturally beautiful, but those who have spent time with it say it fills people's minds with terrible thoughts of cruelty and evil. However, we can shatter it and, if we're careful, use it to power our forges...
1. Destroy it utterly, and see that none obtain its fragments. A thing of such evil cannot be allowed to exist, no matter what temporary gain. (Change to good.)
2. There is nothing so evil it cannot be used for good. Do what you can with it, but be careful. (Forge productivity increases slightly)
3. How can anything beautiful be evil? I must see it for myself. Send it to me; I'm sure it can do no harm. (Change to evil.)
EDIT: Score system is also a great idea. Perhaps these events would affect that score instead, although enough to make sacrificing the benefits worthwhile IF you really wanted to convert. Maybe the "neutral" choice for good/evil civs would provide slight benefits and a lesser push towards the opposite alignment.