My dad and I talk about this 'feeling' all the time.
He traveled to Disneyland as a little boy with his parents within the 1st few days it opened way back in the 50's. He tells me now that when he heard in 1970 that there was soon going to be a new park in Florida, he knew he would take HIS children there someday.
I traveled to WDW with my parents as a child during the 70's and 80's, with my parents and grandparents as a young adult in the 90's, and now with my dad and my children any time we get the chance. Every time we approach MK on the bus, I crane my neck to get that first glimpse of the castle in the distance as we approach, and EVERY TIME without fail, I am overwhlemed...sometimes it is more than I can take. I say a short prayer in my head that I am fortunate enough to give my children what my father and grandparents gave to me, and that is Magic- Disney Magic to be more accurate.
My last visit was in January 2007. I have a 4 and 6 year old little girl who are 'all about' the princesses. When we went to the Princess Breakfast @ EPCOT during our stay I had that same feeling of being overwhelmed. Watching my daughters interact and be totally mesmerized and enchanted with Aurora and Belle among others left me visibly touched and changed in a way I'll never forget!
The magic of Disney is what I try to bring to my family in little ways everyday in the littlest of things.
I hope that my children adopt the same feelings I share today with my father, and pass it along down another generation when they, too, have children...that would be my dream come true!