I'll admit it, I did not go through all 61 pages to see if this is a repeat thread. Forgive me if it is.
Onward...I've seen movies that were so bad they were good, but my pick for all time worst has to be Wing Commander. It had no story, bad acting and special effects that commercials blew away. My friend and I kept waiting for anything to redeem the movie before the closing credits, a cool explosion, awesome bad guy death, unnecessary gratuitous *ahem* scene or something, anything. But nothing. Most of the people in the theater left well before the end, but the few that remained left with a smile on their face when they got to hear my friend shout out "I've seen detergents that make a better film than that!" Enough said.