I first went to WDW as an adult on my honeymoon. We had no children at the time. I did however run two business, and even when I was not "at work" there was (and still is) a constant stream of issues and phone calls to deal with. Staying on site at WDW was the first time in years when I was truly able to completely relax. Even on other vacations, there were always things that I had to manage and deal with. At WDW, I am taken care of. There are 50,000 cast members available to deal with my every need, and they go above and beyond to make me feel as if my immediate desires are the most important things in the world. Yes, I enjoy the rides and attractions, some because they bring back fond childhood memories, but many because they are truly spectacular even for an adult. Even more than that though, I appreciate the massive infrastructure designed specifically to melt the outside world away. The Magic Kingdom is a top notch theme park, but not necessarily something I would return to again and again as an adult without children. WDW as a whole, especially if you are staying on property is so much more than a cluster of above average theme parks. From spas, to golf, to top notch dining and entertainment, just about anything you could want while on vacation can be found right there on property, Even more important than those ammenities, is how they go above and beyond to remove any pain points that may come between you and your optimal enjoyment of all there is to do. I can't speak for other adults, but when I went to WDW before I had kids, it was because WDW was one of the few places in the world where I could shed all of my real world stress and enjoy myself in a make believe world of joy. I also have 17 acres with a cabin in the woods for this purpose, but it doesn't come complete with 50,000 people to cater to my every need. Don't get me wrong, I love my real world life, but every once in a while I need a break ,and there is no better place to escape to than WDW.