I have been to WDW every year since I was 11 (with the exception of 2004, since we were cancelled by Hurricane Frances), and I could not imagine going on any other vacation. My DH thought I was crazy until we got married and I insisted on going to WDW on our honeymoon. After that, he was hooked and we go every year! HAHA! My DH friend and his family went one time, since we told them all about our trips. When they returned, they said they were glad they went, but would never go again! I think that some people are just "Disney People", and others are not... oh, well.
Also, about SDC, we used to have SDC about an hour from us, in Pigeon Forge, TN. Now it is Dollywood. We get SP for Dollywood, and go frequently, but it is NOTHING compared to WDW! The only reason we even go to Dollywood is because it is so close, and it is somewhere we can go for just a day trip!