Top 3 by park:
Magic Kingdom
1 - Splash Mountain
2 - Space Mountain
3 - Carousel of Progress
Epcot
1 - Soarin
2 - Spaceship Earth
3 - Test Track
Animal Kingdom
1 - Expedition Everest
2 - It's Tough to be a Bug
3 - Nemo, The Musical
Hollywood Studios
1 - Tower of Terror (overall favorite of all parks)
2 - Toy Story Mania
3 - Streets of America