Here they are some of my very favourite movies of all time!!! I almost found stamps of all of them except this movie titled "De Profundis" [link] which is wonderful but I suppose not very popular.  Some other movies were not included because, though I like them I don't like them that much or because there were more life action staff than animated/ stop-motion/cgi/puppet stuff.
By the way, Muppets movies and Hellboy Animated movies have the more representative stamps I could found...sort of.

Enjoy the stamps and if you don't know one of the movies here shown then you have no childhood, just kidding; ask me if you want