This is kind of interesting. It's the site of a group of social psychologists who are studying moral decision-making.
One of their observations is that people don't all make the same moral choices for the same reasons; and things get interesting when they compare the moral grounds of self-described liberals and conservatives. There are significant differences.
Which is to say, not just the moral choices themselves, but the motives behind those choices- which the authors divide into five categories (Harm, Fairness, Loyalty, Authority, Purity) that allegedly account for all our moral reasoning.
The first survey, the "Moral Foundations Questionnaire," graphs your answers alongside the averages for liberals (blue) and conservatives (red) like so:
But is green my color?