I'm with all of you. There are many moments when I'm just so moved I'll cry tears. Watching the looks on my kids faces when characters pay extra attention to them or when a CM does something nice, seeing the ships for the first time, hearing the horn.....
But the thing that rips my gut the most is walking out of the Magic Kingdom for the last time on that trip. Even if it's not our last day at Disney, the last time at the Magic Kingdom is so emotional. It's not wanting to leave but it's also all of the memories of my time there, from my first visit in 1974 to now, from going with my parents, then my kids, then my kids AND my parents!

I literally will walk down main street telling myself (out loud) "don't look back, don't look back, keep walking, don't look at the castle" but I never listen to myself and always end up turning around, seeing the castle and bawling. My kids make it worse by running up to me, hugging me, and saying "don't worry, mommy, we'll come back, it's ok."
I have the picture frame that talks about memories of the Magic Kingdom....the monorial, Mickey and the gang, the smell of popcorn, the music, etc....then it says "and there it was at the end of the street, CINDERELLA CASTLE".... I'll admit, reading the frame can make me cry.