1. 'The Rocky Horror Picture Show'
Could any other movie have possibly won this poll? This low budget 1975 film tanked when it came out, but the following year a New York theater started showing it at midnight and within months a fiercely devoted cult started seeing it over and over, dressing up like the characters and singing along to the songs. The tradition continues today, though the movement peaked in the 1980s and 1990s. Like many cult movies, there's a quasi-sequel (Shock Treatment) that fails to live up to the original, or even come close.