What makes it fun is that multiple people have invented a lot of rules around what a good story should be. Aristotle has written what's closest to the Newton Laws. It's badass that Newton's Laws still hold up with astrophysics and it's badass that something someone wrote in ancient Greece still holds up in the modern era of cinema. It's flawed, but it says things straight, instead of lots of maybes, so it's easy to prove true or false.
Megamind is an interesting beginner's analysis. It's very formulaic but doesn't look anything like that. It's subtle too, his cloak changes color according to his progress as a character.
Toy Story is probably the most interesting because it doesn't really fit in any major format. It's a Comedy, there's a misunderstanding, and things go from high to low to high again where enemies are friends. But that's about it. There's a lot of little highs and lows, as opposed to the usual where it's all ascends to one really big high (e.g. Guardians of the Galaxy). In Toy Story, he's about to get home, then things get worse. He makes another plan, it fails. It just gets progressively worse. There's no fixed mentor character too. Buzz and Woody are both protagonists, antagonists, and mentors to each other, except the story is told through Woody's perspective. The most interesting part is that they hatched a formula from it that works, which is used in all other Toy Story movies and a little in other movies. It seems they didn't follow the classical literature analysis and made up their own formulas and it works.