[jpj1421]

Shrek 2 and Toy Story 2/3 are self evidently better than their original movies.

I think Shot in a Dark (and to a lesser degree the other Peter Sellers Pink Panther sequels) are leaps and bounds better than a Pink Panther. Of course, they changed the main character from the thief to the Inspector for the sequels and were better for it.

Christmas Vacation is arguably as good/better than Vacation.

Ghostbusters 2 is not as good as Ghostbusters, but it's pretty good...except the setup and finale.

Clerks is only a bit better than Clerks 2, but both are great. Same with the Back to the Future movies.

Evil Dead was a horror movie with comedic elements, and the comedy sequel was better....that was a bit of a stretch.

Uhhh..The Great Muppet Caper is better than the original movie.

That's about it I think. Comedy sequels are difficult, clearly.

/Edit

The first 5 minutes of Game of Thrones are very odd when coated to everything else. It was more of a "Hey, try to not forget this as everything else goes down." I tell people, watch the first episode beginning to and and if you aren't compelled to watch the following episode it's not for you.