Worst film
Worst film I've seen? Carry on Columbus.
I'd tell you what was wrong with it, except I simply have no memory of what was in it - my recollection of the film is limited to a single image of Jim Dale stepping onto an obviously fake deck in an unconvincing costume. I can't remember any details of scenes, characters, dialogue or plot (if there was one). It's the only film I've ever seen that made no impression on me at all.
Runner up: Blair Witch Project. Poor quality, unsympathetic characters, unconvincing lines, not in the slightest bit scary. A waste of money, and totally inconsistent with the hype surrounding it.
Roy