For me, it's the moment I step into the Space Mountain star tunnel. I love that BGM loop! Second, is near the pond between The Land and Imagination- the BGM there gets me every time.
It's not a ride.....it's when I'm coming in to WDW & see the monorail on my right,,,that starts it....then when I see the guardhouse & get greeted by the guard at WL......I start smiling!
Jim
Give me one of Haunted Mansion or Pirates of the Caribbean. I can get by with a closure of one, but I expect to return to an even more epic edition of the ride next year.