It seems to me that when you make a decision, there are 4 factors:
Legal -- is it legal?
Utility -- will it bring me/everybody happiness?
Morality -- is it right?
Ethics -- is it acceptable?
For example: Should I run a stop sign at 4am?
Legal - $180 fine
Utility - I will get to my destination faster
Morality - ?
Ethics - ?
Can you think of any other factors when making decisions?
Morality/Ethics on the stop sign question: what happens if there's someone else driving by at 4am? You can never be certain. Are you willing to risk harming them and/or yourself? It's a very minute risk, but it's definitely there.
This is a pretty good categorizing of things you use to weigh decisions. I think there is another that should be included, especially in the area of love:
Experience/Foresight -- What are some of the things that have happened to you in a situation similar to this? How has the other entity interacting with you acted when you've done certain things that may somehow relate to the matter at question? What, according to previous similar experiences, is a plausible expected outcome?
We have done this in Psychology. You basically have the right idea, they are weighted differently/change at different points in life though.
Duh... everything's relative.