I´d settle for the Shrek films, for making me cry tears of joy and laughter for hours.
Princess Mononoke, Akira and the Ghost in the Shell films for being epic animes, sadly the first one has just been showed uncut ONE TIME here in Germany, and i watched it...since the new "ban voilence!" cry by the politians, it will probably never be shown again.
And mostly all of the Disney and Pixar movies, for filling my childhood with glee and joy.
Have to watch WallE some time.
The Spirit Within is also an awesome Movie.
And an important one, an animated documentation that everyone should watch.
Waltz with Bashir is probably one of the best animated "movies" out there, following the events that occured during the Lebanon war, and a young Ari Folman trying to puzzle together his connection to the Shabla and Shatila massakers.
It´s just so surreal that you think none of this ever happened, yet all the characters are real, and it even shows some shocking reallive scenes at the end. A must watch for history interested people.
My last vote goes out to a little patriotic side, a german animation film based on the book Felidea, with the same name. Has been released in English too.
Don´t let the Disneyesk look and the Animal (Cats) maincast fool you, this is one bloody thriller involving murder, rape and racial purification... definatly a place in my top 10.