As far as the style of animation, I love The Jungle Book and Peter Pan. I just love those atmospheric colors (that were very popular during the early 60’s) and the songs in JB are just super funny and sing-able. I recently found a couple of interesting documentaries about the making of Peter Pan and Jungle Book (this is part 1 of 12). The most interesting part was finding out that they used real live actors, to do all of the movements and voices, and then the animators would use these visual cues to make their illustrations. Turns out that the voice actress who did the voice of Wendy in Peter Pan, also did the voice of Alice in Wonderland.
But I would have to say that Toy Story 3 and Despicable Me and Megamind were probably the funniest (pee in your pants) movies I’ve ever seen. I mean who makes a movie with a ray gun that squirts fish? And who makes a funny, scary and sympathetic character out of a giant, half naked plastic doll (Big Baby)? Great stuff.
My favorite TV cartoon is Sidney the Elephant (crazy, minimalist, psychedelic stuff)
On a side note, there is a great documentary about the making of Mary Poppins, with some great info about the animated parts. The series is narrated by Dick Van Dyke. You can see it Here (this is part 1 of 6).