Why sequels mostly are inferior movies.

This comment really hits the nail on the head on why I personally am unimpressed by most sequels:

Quote:

We spoke to Travis Knight , who runs the animation company Laika, about sequels in general. His company has never made one, and he specifically said that "when you look at a story, ideally, the story should explore a pivotal moment in the protagonists' life. If we're doing a sequel, by virtue of what it is, it's going to be a diminishment. The second most pivotal moment of his life?"