'Poseidon' - the remake of 'The Poseidon Adventure'. They took a fun, character-driven disaster movie and turned it into a SFX show without a trace of personality or conflict between its paper thin characters. They were just there to die in various CGI-rendered mishaps.
'The Stepford Wives'. What on earth possessed them to take a tense, psychological thriller and turn it into a zany comedy? Not only was the idea itself flawed, but the makers changed the second half of the story (leaving the first half intact) due to negative pre-screening response, and so the whole plot made absolutely no sense in the final product!
'Bewitched'. There were so many things that made no sense in this movie that it's difficult to know where to start. It was billed as not being a remake, but based AROUND new fictional characters remaking the show, in a 'film within a film' scenario. So why the hell did the new character have relatives all exactly like Samantha Stevens (Aunt Clara, Uncle Arthur) - was it just coincidence that she then went on to remake a show about Sam and Darrin? Just a confused mess.
'The Women'. A biting, witty satire of the cattiness of upper class women in the late 30s reinvented as a warm-hearted chick-flick that was basically a children's version of Sex and the City. Absolutely dreadful.
'Psycho'. A shot for shot remake = a completely pointless remake. Oh, and the acting was much poorer than in the original.
'The Truth About Charlie'. A remake of the delightful madcap thriller starring the incomparable Audrey Hepburn and Cary Grant - here replaced by the dull as dishwater Thandie Newton and Mark Wahlberg. All chemistry, intrigue, wit and suspense had been jettisoned.