Some of the people on this thread are just rude. Everyone has different interests, whether it be sport, tv shows, movies, Harry Potter, anime, fan fiction, music, amateur theatre, Disney, Star Wars, lord of the rings, lego, cleaning (Mrs Hinch style), woodwork, models, gardening, cars, bikes (both types) the list goes on.
I am a Disney adult. I love the movies, the music, the merchandise. I have been to Florida over 25 times in the last 30 years. Some holidays were only the odd day at Disney World and travelling around Florida, and some were days and days at Disney World. The last 3 times where full Disney World holidays in the "Disney bubble" where I introduced my DH to Disney World. The last 2 times were with my DS where I am sharing my love of Disney with him.
For me it's partly nostalgia, as my first trip was my 3rd birthday with my parents and grandparents and then my parents bought a rental property in Orlando so it became my second home.
It's a shared interest with my family, my sister loves Disney like me, my DH and DS are growing their love of Disney, and my parents love to share it with us because of all our holidays. I also share this interest with friends and we love talking about it.
It's also escapism, it's the thing that makes me happy and makes me forget about my worries.
And it's also fun, Disney is not just for kids. There are so many things they do that are targeted at adults. I love trying different food and drink at all the food booths during the Epcot festivals. I love the trivia and hidden Mickey's. I love the rides and the firework shows.
I have Disney home decor. It brings my happy place into my home. How is it any different from someone having football tickets framed or their guitar collection displayed or someone having limited condition records on show. When I first bought my house I went for standard decor as I thought I had to as an adult. But as I got older I realised I could do what makes me happy and what makes me happy is to wear my Mickey T-shirt and have some beautiful Disney artwork on my walls.
I would never judge anyone for their interests, it's rude and people who do should be ashamed.