I wonder if having two different systems would be more effective. One measuring Respect/Friendship, based on day to day conversations. Another measuring Affection, based on plot points that are heavily connected to each companion. Disagreement with another's choices and how you personally feel about them aren't always the same thing. I still think each companion should have preferences, but at any good party, between alcohol, the mood, passion and excitement, even shy wallflowers can be swept up in the moment.

Balance is more than light and dark, more than sin and virtue.