Re: how many of these have you seen?
I've seen a handful. The Room and Birdemic are amazing. In truth, many of these deserve their own category of judgment. They are bad in an inspired and watchable way. Dolemite, for instance, is something I recommend to everyone (watch with friends, it makes all the difference). Then you have truly bad movies that have no soul whatsoever. Those don't make any list, and many of them star Harrison Ford.