I fall in the "read the book and therefore had problems" camp with Lynch's Dune. I like the casting and there were cool things about it, but Lynch's auteur tendencies irked me ... some of the changes he made altered what I saw as intrinsic parts of the book. But the Sci-Fi version had lots of problems too. But Kyle MacLachlan is yummy ... I even liked the cheesy sci-fi film he was in--The Hidden. He wasn't in The Hidden 2, so it wasn't worth watching.
Other movies that are officially not good that I still like... probably legion. Some off the top of my head: Deathrace 2000 (probably my favorite Stallone movie along with Tango and Cash), The Last Starfighter, The Last Dragon (wasn't that Vanity's only movie besides Purple Rain?), Shock Treatment (at least a lot of my friends tell me it's a bad movie, though I disagree), and any happy-ending Western with Audie Murphy. There were a bunch of old Tony Curtis movies I watched and liked, but they never run them on TV any more and they don't seem to be available for purchase: Flesh & Fury, The Black Shield of Falsworth (yonder is the castle of my fadda), 40 Pounds of Trouble). Oh, and The Lively Set with Doug McClure and Tony Darren. I guess it's obvious that I watched way too many movies in my impressionable youth. --Rose