What was your number 1?
I'm getting married in September, so can't answer your question yet, but the things that have made my relationship successful are (1) communication, (2) wanting it to work / being willing to put in time to work on things that need work, and (3) a really solid friendship - I love him to death but our love is built on a really strong friendship. In fact, we were just friends for a few years before we started dating.