I have the opposite experience, where if I have a bad trip to Disney I immediately want to go back to rectify it and try again for that "Disney Magic" that I missed out on, and I've had a handful of bad Disney trips and experiences. A lot of those were purely due to personal problems, though I've definitely had problems with CMs too and they can really ruin things - Once on PotC too actually (a CM told my husband and I we were stupid for wearing Cinderella & Little Mermaid shirts), though we figured the CMs there are instructed to be rude so they're more "Pirate" like. Now though, two years since my last trip to Disney World, I can feel the magic dying, and this time I'm not sure why. I guess I don't see it as worth my time any longer, even though I know new things are opening semi-regularly, but none of these new things really seem that interesting or exciting to me. This is actually the first time...probably ever...where my husband wants to go to Disney World and I've actually said "Eh, let's go somewhere else." Currently I'm planning a huge trip for the 50th anniversary celebration, which I'm hoping coincides with my birthday that year (though it probably won't), but I'm okay with that being my next trip and right now I'm even considering putting all of that money aside for a birthday trip somewhere else.
What I'm doing instead is considering what I enjoy about Disney, and finding that elsewhere. I enjoy the nostalgia for a time I wasn't even alive for, so I watch older Disney movies like Snow White or Pinocchio. I enjoy the excitement of the theme park, so we're going to try to go to the theme parks near us this summer that we usually pass on. I enjoy the Floridian/sub-tropical/tropical environment, so we're considering vacations to the Caribbean or other spots in Florida. And, when I do feel the urge for a specifically Disney Vacation (which is still a regular desire), it's not for Disney World anymore - I'm finding myself on the
Disneyland, Disney Paris, or Disney Beach Resort websites a lot more now. It's taken me a long time to realize I can even enjoy things that Disney doesn't sponsor because everything I loved had a huge Mickey stamped on it for years, so it's been very interesting to try to find new things to do and exciting to broaden my scope beyond the most magical place on earth. I hope that is something everyone can do, because while I love Disney, I think it's even more magical when it's not your everything.