Gotta weigh in on Pixar (who's the only reason I even regard Disney as an entity). Toy Story 2 felt so contrieved and disjointed. But it was good. For the worst Pixar film, I'd have to struggle to say "Finding Nemo." Seriously, you can't have a Pixar/Disney film with no bad guy. And that school of fish thing was pointless (but it kept that voice actor in, which I guess was the point). Cars was an instant classic.

How do you all rate the sequels to these more time-tested films:
Jaws
Rocky
Godfather (above comment noted)
.... Police Academy??