This is according to
IGN25. Lady and the Tramp
24. A Bug's Life
23. The Cat Returns
22. The Lion King
21. Beauty and the Beast
20. My Neighbor Totoro
19. Princess Mononoke
18. Persepolis
17. Monsters, Inc.
16. Wallace & Gromit: The Curse of the Were-Rabbit
15. Ratatouille
14. Dumbo
13. One Hundred and One Dalmations
12. Fantasia
11. The Nightmare Before Christmas
10. The Iron Giant
9. The Incredibles
8. Finding Nemo
7. The Secret of NIMH
6. Kiki's Delivery Service
5. Kirikou and the Sorceress
4. Pinocchio
3. Snow White and the Seven Dwarfs
2. Toy Story
1. Toy Story 2
So? What do you think?
Personally, I think this is debatable list, but I find it american heavy. There's a lot of quality animation over the world that isn't in the list, granted some of it is not necessarily as universally accessible as say Snow White (ie. Les Triplettes de Belleville). But where are some Japanese classics like Spirited Away, Akira, Tokyo Godfathers, or Grave of the Fireflies?