I'm curious everyone. Have you ever been in, or are you currently in, a relationship with someone who is of a different religion? How do you handle such basic differences, etc.?

Yep. I'm a Pantheist, and am somewhat sympathetic to non-radical organized religions. My girlfriend is a pretty-much militant atheist.

Fun arguments.

I think most couples have different opinions on religion.

Although, it's not always as apparent when two people claim to belong to the same religion, as they are using the same terminology, but with different meanings.

If you start asking questions that aren't in the core doctrines, you'll start seeing surprisingly different answers.