I think this will end up being a fairly sad list.
1. Horizons from EPCOT. All time greatest amusement park attraction EVER. A shame it's gone.
2. World of Motion from EPCOT. Wonderful use of AAs. Funny and dynamic. Catchy music. A shame it's gone.
3. Pirates of the Carribean from Disneyland. An unbelievable classic. What all rides after should aspire to be.
4. People Mover from Disneyland. Relaxing and long enough to soak up the Tomorrowland atmosphere and recharge your batteries. Gave some nice previews of attractions, and really made me feel like I was in the future. A shame it's gone.
5. Haunted Mansion from WDW (2006). It has had changes since I last saw it, so this could change, I suppose. Wonderful immersion and theming. A slight edge to Florida's due to a couple of extra rooms.
6. Spaceship Earth (Jeremy Irons version) from EPCOT. Brilliant and inspiring. I can't see how any of the changes they've made to it could not hurt it some.
7. Journey into Imagination (the original) from EPCOT. whimsical, magical, and inspiring. A shame it's gone.
8. Cranium Command from EPCOT. funny and creative. fast moving and even emotionally moving. A shame it's gone.
9. America Sings from Disneyland. Catchy music, fun animatronics, good length and rarely any real wait. At least I still can see the critters in Splash Mountain. A shame it's gone.
10. It's a Small World from Disneyland. An edge goes to Disneyland's version, due mostly to the spectacular appearance of the building's exterior. What can I say? I know this ride gets much maligned, but it makes me feel happy. A nice escape from the world, and a chance to wish "If only..."
Yeah, it's a shame so many on my list are now in Yesterland.