Akira's a given. So is Fantasia. Waking Life, enh....Not so sure it belongs on this list. I don't know what the hell Yellow Submarine and Heavy Metal are doing there. Fritz the Cat could have been left out. Who Framed Roger Rabbit should have been on there. Lupin III could have been included. And maybe the Lord of the Rings cartoon? And definitely all of the Miyazaki films (seriously, any of his movies could be on that list). They could have considered A Nightmare Before Christmas. Metropolis, Ninja Scroll, Ghost in the Shell, Hercules, Mask of the Phantasm....Steamboy. Polar Express. Finding Nemo. Shrek. Lilo & Stitch. Rudolf the Red-Nosed Reindeer.
My top animated movies, in no particular order:
Akira
Lion King
Iron Giant
Tarzan (Phil Collins!!)
Mulan
The Incredibles
A lot of other classics, like Snow White, Pinocchio, Cinderella, Sleeping Beauty, Alice in Wonderland, Jungle Book, Aladdin, Robin Hood, Little Mermaid, Beauty and the Beast, Land Before Time, A Christmas Carol, Fox and the Hound, Balto, Hunchback of Notre Dame, James and the Giant Peach, Prince of Egypt, Toy Story, etc. I haven't seen since preschool, so I can't really judge them.