As a rejoinder (oops, still hung over from finals week in law school) to The A. V. Club's Actors we hate in movies we love article, I post my own, one and only example....so far.

Will Ferrell (or his voice) in Megamind. I love animated films and I hate Will Ferrell. Ever since I saw him on Step Brothers, which is, by far, the worst film ever, my utter dislike for him did not wane. Talladega Nights can't erase the bad memory that is Step Brothers, which is even more distasteful than Funny People. Not seeing Will Ferrell's weird, not really funny face in Megamind I guess contributed to my appreciation of the film.