For me, Disneyland really grew to become the place where we had the majority of our really special family memories. We were there so much that it's easy to see how that turned out to be the case. We've celebrated birthdays there, used it as an excuse to skip school (and work, shhhh!), and honestly, I feel like I've watched my children grow up at Disneyland. (We've spent a ton of time at DCA, too, but that park changes - and is still changing - so much, that it just doesn't carry the kind of "same" factor that Disneyland does, for us).
One of the things I love most, is the idea that when my children are grown, and they go to Disneyland with their own families, and even much later when I've passed on, they will have so many vivid memories of times we were together there. I feel like they'll be able to go there and really recapture that feeling of what it was like to be there with me and their Dad when they were little. They'll be able to stand in a specific spot and think, "I stood exactly here with Mom".
We have moved around a lot during their childhoods, so it's not like they've gone their whole lives with the same bedroom or the same yard, like some kids do. But Disneyland has remained the same, and even with changes in the future, many key things will likely never change. So, for me, it's been really heartening to think of my kids, when they are much older, being able to, for instance, walk up to the POTC entrance, and remember EXACTLY what it was like to stand there as a child, with me. Having lost my Dad last year, and not being able to go to his 30 year residence anymore (which felt like "my" home), I've found comfort in restaurants, certain beaches, and public venues that he and I enjoyed together throughout my lifetime. That's what I feel Disneyland will be for my kids in the future. It's where I've made many of my most favorite Mommy memories.
When we visit again in September, the kids will be 19, 13, 10, and almost 7!