I usually hear bad things about 2 Fast 2 Furious and Jurassic Park 2, but I liked the both of them.
I hated 2 Fast 2 Furious. I thought even Tokyo Drift was better. Not that either is "good" in the first place but still...
Austin Powers 2, that's one I forgot. How quickly some of those jokes became stale. Brutal sequel. Through most of the movie it seemed like they were begging for laughs and it failed.