here is a somewhat "official list" of the top 50 cult films of all time. i've seen all but 3. man i love "cult" flicks.
Entertainment Weekly Top 50 Cult Films:
1- THIS IS SPINAL TAP (1984)
2- ROCKY HORROR PICTURE SHOW (1975)
3- FREAKS (1932)
4- HAROLD AND MAUDE (1971)
5- PINK FLAMINGOS (1972)
6- TEXAS CHAINSAW MASSACRE (1974)
7- REPO MAN (1984)
8- SCARFACE (1983)
9- BLADE RUNNER (1982)
10- SHAWSHANK REDEMPTION (1994)
11- FIVE DEADLY VENOMS (1978)
12- PLAN NINE FROM OUTER SPACE (1959)
13- BRAZIL (1985)
14- ERASERHEAD (1977)
15- FASTER, PUSSYCAT! KILL! KILL! (1966)
16- THE WARRIORS (1979)
17- DAZED AND CONFUSED (1993)
18- HARD-BOILED (1992)
19- EVIL DEAD II (1987)
20- THE MACK (1973)
21- PEE-WEE'S BIG ADVENTURE (1985)
22- UN CHIEN ANDALOU (1928)
23- AKIRA (1988)
24- THE TOXIC AVENGER (1985)
25- WILLY WONKA AND THE CHOCOLATE FACTORY (1971)
26- STRANGER THAN PARADISE (1984)
27- DAWN OF THE DEAD (1978)
28- THE WIZ (1978)
29- CLERKS (1994)
30- THE HARDER THEY COME (1973)
31- SLAP SHOT (1977)
32- RE-ANIMATOR (1985)
33- GREY GARDENS 1976)
34- BIG LEBOWSKI (1998)
35- WITHNAIL AND I (1987)
36- SHOWGIRLS (1995)
37- A BUCKET OF BLOOD (1959)
38- THEY LIVE (1988)
39- THE BEST OF EVERYTHING (1959)
40- BARBARELLA (1968)
41- HEATHERS (1989)
42- RUSHMORE (1998)
43- THE ADVENTURES OF BUCKAROO BONZAI (1984)
44- LOVE STREAMS (1984)
45- SUPERSTAR: THE KAREN CARPENTER STORY (1987)
46- AGUIRRE, THE WRATH OF GOD (1972)
47- WALKING AND TALKING (1996)
48- THE DECLINE OF WESTERN CIVILIZATION PART II: THE METAL YEARS (1988)
49- FRIDAY (1995)
50- FACES OF DEATH (1978)
HONORABLE MENTIONS: OFFICE SPACE