Scroll down to read the original post - just a couple more thoughts.
Again, to play Devil's Advocate to the thinking that great animated characters shouldn't talk much - look at the classic Warners shorts. They're among the most universally beloved peices of animation ever - and some of the best ones are full of dialogue. What film character talks more than Bugs Bunny? Or Daffy Duck? Those shorts where the two of them were together are my favorite ones, and they both talked incessantly. But both of their personalities are the kind that are easier to express with a character who talk a lot. Dumbo and Dopey have personalities that are more effective when they DON'T talk.
But all this discussion about dialogue shouldn't lead anyone to forget that dialogue, ultimately, isn't that important. People remember the great characters in a movie, not exactly what they say (with the exception of "Make My Day" and "Hasta La Vista, Baby", of course). And what makes a movie compelling is the EVENTS. When you walk out of a movie, you don't turn to your friend and say "Remember when Indiana Jones said that line?". You say "Remember when this HAPPENED? Remember when he DID that?".
I remember when "Titanic" came out. People at work ridiculed the movie and how rotten the dialogue was. But you couldn't deny that people responded to the movie -astoundingly well. So obviously they weren't put off by the dialogue. The characters and their situations were what people found engaging and compelling.
*UPDATE: Let me clarify that in many movies what the characters say IS what's happening. In a movie like "Ordinary People", none of the characters run away from giant boulders or anything, but the things they say to each other carry huge weight and drive the story in new directions with every revelation. So the EVENTS are driven by what people say. But the EVENTS - the subtext behind the dialogue - are still more important than the actual lines themselves. You remember what happened in the movie, but not the precise way things were stated.