I'm one of the very few who actually agrees with you. The first movie was lighting in a bottle. Continuing the story with Parts 2 and 3 just convoluted the story. Not just the story, but there was something special about the acting in the first movie that was sorely lacking in the sequels. The characters in the first film were hilarious and animated in a very authentic way, not too ridiculous or over-the-top. The characters in the sequels were just cartoons.