Writer/filmmaker Michael O’Connor posted a highly-enjoyable defense of his affection for TPM, largely focused on the theme of symbiosis in the film:
In the world of the film, the metaphor of symbiosis is not just applied to the Gungan race and the Human Naboo who both inhabit the same planet. It also carries over to the political “body” of the Senate, the internal workings of The Force, and the motley crew of Jedi, royalty, droids, alien and slave that must join forces to combat the greater threat of the Sith.
Symbiosis is not just unnecessary flavoring to an action adventure fantasy story; rather, it is the ENTIRE point of the film.
Go check it out!