AA is my favorite thing about WDW.
Out of all the times I've been to WDW, and that is more than I can count, I've only missed seeing my favorite 2 times. And let me tell you, everyone that was with me knew that I was missing it!
I'm 40 and I love the flashbacks you get from the end, I love the music, I marval at how the whole thing works and I love the history lesson.
This past May I took my DS 7 and DD 5 for the first time. My son now says that it is his favorite in Epcot as well.