DH and I both have always been Disney lovers, but living on the west coast, we grew up going to DL. We wanted to share the magic with our kids too. A couple years ago we went on what we thought was a "once in a lifetime" trip to WDW, and before we were even halfway into our trip decided that we just had to go back. After some particularly magical CM interactions, dh said, "Why do we ever want to vacation anywhere else?" So the next time we walked by a
DVC kiosk, we signed up for a tour and that was that.
We knew we'd made the right decision when a few months later we made a rather impulsive decision to go back (just the two of us) for our 20th anniversary. Without DVC we likely wouldn't have done anything more than go out to dinner for the occasion, and we surely would never have done anything like flying to Orlando for 5 days to celebrate. What a fantastic memory we made.
Now we're planning a trip for next year with the whole extended family. That never in a million years would have happened without DVC.
So it has given us the ability and the push we needed to spend time and make memories with our kids, each other, and our folks & siblings. And we get to stay in really nice places while we do it!