Can't believe no one's responded to him yet, but Atrios has asked for the names of movies which are critically acclaimed but which you can't stand. I have to agree with him on The English Patient. The Piano has always been mislabeled as a drama since any movie featuring Harvey Keitel's bait and tackle qualifies as horror.
I don't know if it was exactly critically acclaimed but I've never been able to stomach Harry Potter and the Sorcerer's Stone. Just didn't work for me and actually turned me off the entire series. Go on over and cast your vote.