Ditto, i actually don't mind the two sequels though, but i thought that POTC1 was pretty crappy (possibly due to the stupidly wooden Orlando Bloom having more screen time in the first film than in the sequels).
The 'South Park' Movie is another one. I never liked the series tbh, but my frienRAB used to (and still do) rave about how "hilarious" the movie is. Having actually sat down and watched it i thought it was rubbish, and the humour was infantile (oooooohh! let's see how many times i can say the F word in a film! Hilarious.......*cough*).