What compromises have you found that you had to make in your relationship in order to accomodate your SO's differing belief system? What areas in your religious interaction do you have the most difficulty?
As an atheist living with a jew, I've had to give up eating pork and shellfish in the home (although I make sure to order bacon on things when we eat out just to remind him) to make him happy. I eat very little meat to begin with, so it seemed like a small sacrifice to make.
I've also had to compromise on religious school. It was very important to my husband that our kids be raised Jewish. I've agreed, but he understands that at no point will I ever pretend to believe in a deity or pretend to be jewish in front of them. His compromise was that when the kids come to bar mitzvah age, that they can choose, at that time, on whether they want to be Jewish or not. Since I'm not Jewish, they're not "officially" jewish until they bar mitzvah, even though they underwent infant conversion. At 13, I think that they should be able to make a reasoned decision on what they want to believe. As long as it's not Xian, that is ;).