Yeah... I'd vote for Manos, Hands Of Fate and The Amazing Collosal Man as my two favorites. I don't believe that there's any shortage of lousy movies, though. A couple of nights ago, I was flipping around the channels and came across something with a title like Humanoids From the Ocean Deep. It was like an R rated Creture From The Black Lagoon. These monsters walked up onto the beach to catch teenagers who were having sex, and grabbed the girls and raped them. I watched about two minutes of it, and wondered where the heads silhouetted against the movie screen were. I guess they wouldn't touch an R-rated movie. The movie was "starring" Dough McClure (veteran of a thousand clinkers) and Vic Morrow. Don't stay up for it.
I still like to throw one in the DVD player every once in awhile.. it reminds me of when I was raising my teenage sons and we'd all sit around and watch the movies together, adding our own sarcastic one-liners. The movies definitely benefit from watching them with other people..