Anna,

I'm not sure how many movies I've seen/reviewed in my age-of-reasoning life; I have been going to the movies or watched them on TV since I was a kid, and I've been a film reviewer since I was 17, so I imagine I've seen at least several hundred.

I'm perhaps a bit more forgiving of modern movies than some of my esteemed colleagues here and elsewhere, but I do think that really great movies are somewhat the exception rather than the rule. This is true of today's crop of movies as it is of the Golden Age of Hollywood, at least from my perspective.

The absolutely worst movie I've watched at the movies is John Derek's Bolero, a silly pseudo-erotic film made in 1984 featuring the writer-director's wife Bo.  Not only is it dumb (12 Monkeys seems almost like Shakespeare in comparison), but it's not interesting even in the erotic aspects. 

On TV I've watched many bad flicks, but right now Bolero is the most dreadful bit of cinematic dross that I can bring myself to mention here.