I think if it could be easily described it could be easily duplicated. When my DN was 14, we came down to FL and spent a day at US/IOA. We rode everything, the weather was great and I had a really good time. On the way home I asked DN what she thought and she said: "You know, it was fun-the rides were really cool-but there was something missing and I just can't describe it." A few months later we made a quick stop down here and had ONE day to go to the theme parks-I gave her a choice of any of the 4 disney parks, US/IOA, Sea World or Busch Gardens...and before I was even done with the sentence she said "Magic Kingdom". I was surprised, she was a teenager, clearly outgrown the Princess stage and is a ride junkie. I was sure she'd rather go back to IOA or over to Busch Gardens. So, I asked-"Why MK?" She said: "There's just something about the way I feel when I go there. Sure, the rides aren't as exciting as IOA, but for one day, that's where I want to be"
What makes Disney magical for us is something that we can't really quantify-sure it's memories of times past-but people have good memories from lots of places-there's something more and it's what keeps us coming back over and over and over again.