Here are the 80 movies I've given an 8 or higher on IMDB or 5 stars on Netflix. These are my favorites, which doesn't necessarily mean the 80 I think are the best films. Looking at wg's list, I see I've omitted some, so I'm going to have to come back to this after going to see Little Miss Sunshine, which may just get me to 100.
24 Hour Party People (2002) R Drama
The Adventures of Baron Munchausen (1989) PG Sci-Fi & Fantasy
The Adventures of Buckaroo Banzai (1984) PG Sci-Fi & Fantasy
Amadeus (1984) PG Drama
Amelie (2001) Le Fabuleux Destin d'Amélie Poulain R Foreign
Before Sunrise (1995) R Romance
Before Sunset (2004) R Romance
Bend It Like Beckham (2002) PG-13 Comedy
Big Fish (2003) PG-13 Drama
The Big Lebowski (1998)
The Bourne Identity (2002) PG-13 Thrillers
The Breakfast Club (1985) T Comedy
Charade (1963) UR Classics
Chasing Amy (1997) R Romance
Chicken Run (2000) PG Children & Family
Clerks (1994) R Comedy
The Cutting Edge (1992) PG Drama
Dazed and Confused (1993) R Comedy
Dead Poets Society (1989) PG Drama
Dogma (1999) R Comedy
Edward Scissorhands (1990) PG-13 Drama
Ferris Bueller's Day Off (1986) PG-13 Comedy
Finding Nemo (Widescreen) (2003) G Children & Family
Four Weddings and a Funeral (1994) R Romance
Funny Face (1957) UR Classics
Good Will Hunting (1997) R Drama
Harry Potter and the Prisoner of Azkaban (2004) PG Children & Family
High Fidelity (2000) R Romance
Hotel de Love (1996)
Howl's Moving Castle (2004) Hauru no ugoku shiro PG Children & Family
The Hunt for Red October (1990)
An Ideal Husband (1999) PG-13 Comedy
The Incredibles (2004) PG Children & Family
Jay and Silent Bob Strike Back (2001) R Comedy
Kissing Jessica Stein (2002) R Romance
L.A. Confidential (1997)
The Last Days of Disco (1998)
Lord of the Rings: Fellowship of the Ring (2001) PG-13 Action & Adventure
Lord of the Rings: The Return of the King (2003) PG-13 Action & Adventure
Lord of the Rings: The Two Towers (2002) PG-13 Action & Adventure
The Lost Boys (1987) R Horror
Love Actually (2003) R Romance
Luther (2003) PG-13 Drama
Mallrats (1995) R Comedy
The Manchurian Candidate (1962)
The Meaning of Life: Special Edition (1983) R Comedy
Monsters, Inc. (2001) G Children & Family
Monty Python and the Holy Grail (1975) PG Comedy
Monty Python's Life of Brian (1979) R Comedy
Moonstruck (1987) PG Romance
Moulin Rouge (2001) PG-13 Romance
Much Ado About Nothing (1993) PG-13 Comedy
Next Stop Wonderland (1998) R Romance
Pirates of the Caribbean (2003) PG-13 Action & Adventure
Playing by Heart (1998) R Drama
Plunkett & Macleane (1999) R Action & Adventure
Pretty in Pink (1986) PG-13 Romance
The Princess Bride (1987) PG Romance
Raiders of the Lost Ark (1981)
Reality Bites (1994) PG-13 Comedy
A Room with a View: Special Edition (1986) NR Romance
The Royal Tenenbaums (2001) R Comedy
Say Anything (1989) PG-13 Romance
School Ties (1992) PG-13 Drama
Shakespeare in Love (1998) R Romance
Silverado (1985) PG-13 Action & Adventure
Sliding Doors (1998) PG-13 Romance
The Sound of Music (1965) UR Classics
The Spanish Prisoner (1997) PG Drama
Star Wars: Episode IV: A New Hope (1977) PG Sci-Fi & Fantasy
Star Wars: Episode V: Empire Strikes Back (1980) PG Sci-Fi & Fantasy
Star Wars: Episode VI: Return of the Jedi (1983) PG Sci-Fi & Fantasy
The Station Agent (2003) R Independent
Strictly Ballroom (1992) PG Comedy
The Usual Suspects (1995) R Thrillers
The Very Thought of You (1999) Martha, Meet Frank, Daniel and Laurence PG-13 Romance
Wallace & Gromit: Curse of the Were-Rabbit (2005) G Children & Family
Wet Hot American Summer (2001) R Comedy
Willy Wonka & the Chocolate Factory (1971) G Children & Family
The Wizard of Oz (1939) Children & Family