In no particular order -

Robin Hood, Men in Tights - The only film where I've actually walked out of the Cinema

Fitzcarraldo - I did a Film Studies A Level and we had to watch it. Shockingly shit.

The Marriage of Maria Braun - As above, and as an indication of how bad it is, this is a quote from Wikipedia "The film ends with a series of photographic negative portraits of West Germany’s post-war chancellors"

Anything with Goldie Hawn, Glenn Close, Barbara Streisand or Angelica Houston. Especially when one of them has cancer.

Gone in 60 Seconds - Way too much 'preening' way way too little driving.