Here's my ranking:
1. Radiator Springs Racers (DCA)
2. Splash Mountain (DL and MK, MK version is slightly better)
3. Soarin' (DCA and EP)
4. Expedition Everest (AK)
5. Rock n Roller Coaster (DHS)
6. California Screamin' (DCA)
7. Indiana Jones (DL, would be ranked higher if all of the effects consistently worked)
8. Big Thunder Mountain Railroad (DL and MK, DL version is slightly better)
9. Pirates of the Caribbean (DL and MK, DL version is longer and better)
10. Kilimanjaro Safaris (AK)
11. Grizzly River Run (DCA, if you don't mind getting wet)
12. Toy Story Mania (DCA and DHS)
13. Haunted Mansion (DL and MK)
14. Tower of Terror (DCA and DHS)
15. Test Track (EP)
16. Space Mountain (DL only, MK version is too jerky)
17. Star Tours (DL and DHS)
18. Seven Dwarfs Mine Train (MK)
19. Peter Pan's Flight (DL and MK)
20. Matterhorn (DL, too jerky but new effects put it in the top 20)
1. Radiator Springs Racers (DCA)
2. Splash Mountain (DL and MK, MK version is slightly better)
3. Soarin' (DCA and EP)
4. Expedition Everest (AK)
5. Rock n Roller Coaster (DHS)
6. California Screamin' (DCA)
7. Indiana Jones (DL, would be ranked higher if all of the effects consistently worked)
8. Big Thunder Mountain Railroad (DL and MK, DL version is slightly better)
9. Pirates of the Caribbean (DL and MK, DL version is longer and better)
10. Kilimanjaro Safaris (AK)
11. Grizzly River Run (DCA, if you don't mind getting wet)
12. Toy Story Mania (DCA and DHS)
13. Haunted Mansion (DL and MK)
14. Tower of Terror (DCA and DHS)
15. Test Track (EP)
16. Space Mountain (DL only, MK version is too jerky)
17. Star Tours (DL and DHS)
18. Seven Dwarfs Mine Train (MK)
19. Peter Pan's Flight (DL and MK)
20. Matterhorn (DL, too jerky but new effects put it in the top 20)