During an interview, Star Trek (and Lost) director J.J. Abrams had this to say about interfaith marriage:
My wife is Irish Catholic and it’s a fascinating thing having married someone who’s of a different religion, because you get to understand and see and respect another way of growing up and believing. That to me is interesting and healthy.
I always say interfaith couples have a deep understanding of religion’s place in their lives. A same-religion couple can (often erroneously) make the assumption that they share the same traditions and beliefs. But an interfaith couple cannot make any assumptions. They have to talk about how they were raised, what they believe, what they are unsure of. They have to think how they want to raise their kids, and celebrate the holidays. The have to figure out how to talk about family, heaven, sin, faith, God. They have to talk, they have to discuss, and more importantly, they have to make decisions about all this as a couple. This ongoing conversation makes them, their family, and their faith stronger.