To be honest, the only ride or attraction at WDW I did and hated was Stitch's Great Escape. I love all of them, headliners or no. But for me, it's the teacups. When I was a kid, I'd see commercials for Disney with the families spinning on those things laughing hysterically. My best friend went to Disney every summer with her family and had a zillion pictures on, near, and with them. I wanted to go to Disney SO BAD, and my family had no means to take such an expensive vacation.
When I finally got to go in 2007, I made a beeline for those twirling cups. Felt like I'd finally gotten to do something I'd always dreamed of. Still my favorite!
At Animal Kingdom, I love It's Tough to Be a Bug
Epcot: Anything in the World Showcase.
Hollywood Studios: Walking along and enjoying all the art deco of old Hollywood. Add that to the Great Movie Ride and One Man's Dream