Mosquito. That movie was such utter SHIT, I laughed my ass off watching it and I will own it on DVD, if it ever gets released.

Battlefield Earth is another one, oddly enough someone gave it to me for XMas (I think it was Abby's Grandparents )...

Dungeons and Dragons was so horrible, I'd rather scrape out my eyes with an oxidized Nickel before watching that again...