For me, it is one place I can truly relax and escape! I have very, very bad anxiety all my life but for some reason it always seems to really let up when I'm in a Disney bubble. As a child I had many fears around eating (afraid of choking) but in Disney, I was so relaxed that I would be much more willing to try to eat foods. All day and night I can ride rides, eat ice cream, be in the warm sun and forget the anxieties of my daily life...it's all very relaxing to me. Seriously, I can get anxious over a piece of paper if you let me, but in Disney? SURE throw me for several loops on a roller coaster at 60 MPH!! I also have a chronic illness that affects my digestion and I find Disney Parks to be so extremely accommodating and understanding that it's very easy for me to eat delicious meals there. I really just enjoy the general positive vibes in the air there. I can get easily anxious if I have to ask to alter food and not once, in any Disney park, has a CM ever made me feel like a burden to their day.
Besides those factors, I grew up making wonderful memories at WDW with my parents and my now-deceased grandmother. So much reminds me of her specifically that it feels like I am still sharing the experiences with her. The Tiki Room, Pirates, Haunted Mansion and Carousel of Progress are attractions I grew up in love with because of her. She used to let me ride on the vacuum around her house to Grim Grinning Ghosts!