I actually like Dune - I even bought the DVD. But then again, I’ve never read the book, so my perspective may be different.
As for worst movies of all time, I nominate Ishtar, Waterworld, Mad Max and my all-time love/hate movie, Plan Nine From Outer Space.
Got that DVD, too ;)
Do yourself a favor and set aside some time to read Dune, it's a great book. It will take a while due to length but it's worth it. The movie is incomprehensible compared to the book.
As for worst movies of all time, I nominate Ishtar, Waterworld, Mad Max and my all-time love/hate movie, Plan Nine From Outer Space.
Ishtar is one of the poster children of bad movies. Waterworld isn't good but it isn't the worst movie, imo. Mad Max appeared to be a pretty small budget film, so it wasn't bad for the money spent on it, probably the same with Plan Nine From Outer Space...although it's not watchable. Some have pointed out Highlander II while a few others are attempting to forget it even exists...but it was detestable.