courtesy of Luxo: a Blog featuring Pixar Animation Studios, here is an interview with pixar's ralph eggleston. he was:
art director for The Incredibles and Toy Story,
production designer for Finding Nemo
story writer for Monsters, Inc
director of For the Birds, among other things.
check out all the clips, they are pretty informative. he talks about how it's not about the technique of the drawing, it's about the emotion; that's the only thing people will respond to. learning to see is more important than learning to draw well. make movies for yourself, not for the audience.