I just finished watching Dario Argento's version of The Phantom of the Opera; and let me tell you, it's a real stinker. Telepathic rats serving as a "family" to a Fabio-esque Phantom, played maskless by Julian Sands; Asia Argento, the director's daughter who at the time was sixteen years old, in sex scenes with said Phantom; pedophiliac overtones; lesbian overtones; blood and gore up the wazoo; bodice-ripping love scenes; a really bad script . . . the list goes on and on. Nevertheless, it's so bad, it's good. I love, love, LOVE this film, because it cracks me up in so many different ways.
Another good one, the granddaddy of all bad films, is Plan 9 From Outer Space by none other than Ed Wood. It's basically an experiment in putting zombies and alien invasion together, all on what looks like a ten-dollar budget, and watching the fun unfold.
So, do tell: what are your favorite worst films of all time, and why?
EDIT: Ack, I just realized that this properly belongs in the Media forum. Mods, please move the thread there.
Magnificat anima mea Dominum!