This is a great and thought provoking question!
The easy answer is that Disney just makes me happy. However, I think it's more that it fits my personality. I developed a love of amusement parks at a young age. Plus, relaxing for me is active. I actually find Disney relaxing and a way to unwind and disconnect with the world. Theme parks, water parks, shopping, dining, golf...it's all there! I love story-telling, detail, and Disney's commitment to making sure even the things you don't see are a part of the story. There is always something new to see or some new fact to learn. The history of the Disney theme parks is fascinating to me, and I love to learn about the challenges, wheeling/dealing, and ultimate results. Incidentally, I'm not a huge fan of the movies. Although they are the foundation of the company I've always loved the theme parks. They're like a movie brought to life.
I've resigned myself to the fact that I am basically the ideal consumer for Disney because I love that I can go to one place and have basically everything laid out to me on a platter. They put everything in one place for me to pick and choose how to customize it to me. And, outside of a small age, I think there's something for everyone. What I loved about Disney when I was 9 is different from now, and will no doubt be different when I finally have my own family. Disney allows for that growth and will always welcome me back. I don't see Disney through rose colored glasses and don't think they can do no wrong, but I do trust that they understand the brand, honor the past, and like that they are willing to take a risk.