X-Men 3 isn't as bad as everyone says it is. It was disappointing when stacked up against the first two, sure, but it's nowhere near the God-awful shit-fest that Spider-Man 3 was. Ugh. And Wolverine ... uuuughhh.
All three Indy sequels are mere shadows of what Raiders was, but I look at all 3 of those the way I look at X-Men 3 - I enjoy watching them all, but consider them non-canon.
Alien 3 also isn't terrible. The "Assembly Cut" is actually pretty good. Again, a mere shadow of Alien, and nowhere near as good as Aliens.
Now Alien Resurrection ... *shudder* *vomit*
Same goes for the Matrix sequels. Ugh.
I feel the same way about the Planet of the Apes sequels that I do about the Indy sequels. Battle is decent, Escape is mediocre but entertaining, Conquest is awesome, but I have yet to see the director's cut (I really want to) - we won't talk about Battle ....
M:I-2 is absolutely terrible, but I enjoyed Abrams' M:I-3 quite a bit.
Video games? I loved the first three Spyro games, but anything after that is terrible.