I like most of the pixar ones and some anime, but for me I think it is lion king. I remember watching that in theaters when I was like 9 or 10. Little did I know I was actually watching hamlet, but none the less it was a great movie. It was pretty sad actually.
Too many Disney/Pixar ones to list.. Waltz with Bashir gets my vote for an animated film geared strictly towards adults.
Wow, rep, somebody else who loves that movie. I completely forgot because I don't consider it animation even though it is...
This was probably my favorite cartoon movie as a kid. Not because I liked it but it scared the hell out of me and I was compelled to keep on re-watching it. <object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/SgCxCZNkQ9E&hl=en_US&fs=1&rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/SgCxCZNkQ9E&hl=en_US&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object> My favorite would be either the Transformers movie or My Neighbor Totoro.
Southpark movie was one of the funniest movies I've ever seen. Top 10 all time among all movies for me. The brave little toaster was also very very good. Definitely deserves an honorable mention.