Off the top of my head....

Apocalypse Now (Redux) - the worst movie in the world; Apocalypse Now being the best!

Herzog's Nosferatu - Sub-Hammer schlock made worse by the lovely opening sequence.

Witchfinder General - the other Folk Horrow film, watched it a month back on holiday in darkest Herefordshire thinking it couldn't be as bad as I remembered it. It was. Worse. Much worse.

Brassed Off - We have a great tradition of home-grown films (Shane Meadows etc.) of which this is a pale and paltry parody.

Full Monty - Ditto.

Four Weddings and a Funeral - Or Four Funerals and a Cemetery as an old mate once called it. It's not that I hate Andie MacDowell (okay, I hate The Smile, but her performance in Groundhog Day is actually quite enjoyable) but in this smugfest even the excellent Charlotte Coleman gets swamped by the excessive goo.   

The Passion of the Christ - the worst story ever told? Quite possibly. Stick with the Last Temptation.

The Life of Brian - I saw it the week it came out and I've been trying to like it ever since; all the more iksome as I'm a huge Python fan & Holy Grail is among my all time favourites.

The Matrix Revolutions - What went wrong?

AVP Requiem - So bad it's actually a work of pure genius; I've got the special edition on DVD.

It's A Wonderful Life - No. It's a very overrated film. Loved my millions, hated by one.

Musicals - Every Single One of Them (Apart from The Wicker Man) - The cinematographic genre from hell.