I don't get the adoration of Toy Story 2. I just didn't like it in comparison to the first. It is more mature, though, so I'll give it that bit of praise.
However, I did prefer the following movies to the original:
- Die Hard with a Vengeance
- Rocky II
- Kill Bill, Vol. 2
- X-Men 2
- Spider-Man 2
- Empire Strikes Back
- Back to the Future 2
- Blade 2
Also, Batman Begins isn't a sequel, it's a restart to the franchise. I do think Dark Knight will be better than Batman Begins, though.