AFI has listed the top 100 movies in 10 different categories. I was upset there wasn't an 'Action/Adventure' or 'War' category since they included a Romantic Comedy, Animation, Sci-Fi and Fantasy category...
There is also a missed movie in the Western genre imo, The Magnificent Seven is one of the best westerns ever made and has probably the most stacked cast.
Here is the website if you are interested.
http://www.afi.com/10top10/
ANIMATION
1 SNOW WHITE AND THE SEVEN DWARFS (1937)
2 PINOCCHIO (1940)
3 BAMBI (1942)
4 LION KING, THE (1994)
5 FANTASIA (1942)
6 TOY STORY (1995)
7 BEAUTY AND THE BEAST (1991)
8 SHREK (2001)
9 CINDERELLA (1950)
10 FINDING NEMO (2003)
FANTASY
1 WIZARD OF OZ, THE (1939)
2 LORD OF THE RINGS: THE FELLOWSHIP OF THE RING (2001)
3 IT'S A WONDERFUL LIFE (1947)
4 KING KONG (1933)
5 MIRACLE ON 34th STREET (1947)
6 FIELD OF DREAMS (1989)
7 HARVEY (1950)
8 GROUNDHOG DAY (1993)
9 THIEF OF BAGDAD, THE (1924)
10 BIG (1988)
GANGSTER
1 GODFATHER, THE (1972)
2 GOODFELLAS (1990)
3 GODFATHER PART II, THE (1974)
4 WHITE HEAT (1949)
5 BONNIE AND CLYDE (1967)
6 SCARFACE: THE SHAME OF A NATION (1932)
7 PULP FICTION (1994)
8 PUBLIC ENEMY, THE (1931)
9 LITTLE CAESAR (1931)
10 SCARFACE (1983)
SCIENCE FICTION
1 2001: A SPACE ODYSSEY (1968)
2 STAR WARS: EPISODE IV- A NEW HOPE (1977)
3 E.T. - THE EXTRA TERRESTRIAL (1982)
4 CLOCKWORK ORANGE, A (1971)
5 DAY THE EARTH STOOD STILL, THE (1951)
6 BLADE RUNNER (1982)
7 ALIEN (1979)
8 TERMINATOR 2: JUDGEMENT DAY (1991)
9 INVASION OF THE BODY SNATCHERS (1956)
10 BACK TO THE FUTURE (1985)
WESTERN
1 SEARCHERS, THE (1956)
2 HIGH NOON (1952)
3 SHANE (1953)
4 UNFORGIVEN (1992)
5 RED RIVER (1948)
6 WILD BUNCH, THE (1969)
7 BUTCH CASSIDY AND THE SUNDANCE KID (1969)
8 MCCABE & MRS. MILLER (1971)
9 STAGECOACH (1939)
10 CAT BALLOU (1965)
SPORTS
1 RAGING BULL (1980)
2 ROCKY (1977)
3 PRIDE OF THE YANKEES, THE (1943)
4 HOOSIERS (1986)
5 BULL DURHAM (1988)
6 HUSTLER, THE (1961)
7 CADDYSHACK (1980)
8 BREAKING AWAY (1979)
9 NATIONAL VELVET (1945)
10 JERRY MAGUIRE (1996)
MYSTERY
1 VERTIGO (1958)
2 CHINATOWN (1974)
3 REAR WINDOW (1954)
4 LAURA (1944)
5 THIRD MAN, THE (1950)
6 MALTESE FALCON, THE (1941)
7 NORTH BY NORTHWEST (1959)
8 BLUE VELVET (1986)
9 DIAL M FOR MURDER (1954)
10 USUAL SUSPECTS, THE (1995)
ROMANTIC COMEDY
1 CITY LIGHTS (1931)
2 ANNIE HALL (1977)
3 IT HAPPENED ONE NIGHT (1934)
4 ROMAN HOLIDAY (1953)
5 PHILADELPHIA STORY, THE (1941)
6 WHEN HARRY MET SALLY… (1989)
7 ADAM'S RIB (1949)
8 MOONSTRUCK (1987)
9 HAROLD AND MAUDE (1971)
10 SLEEPLESS IN SEATTLE (1993)
COURTROOM DRAMA
1 TO KILL A MOCKINGBIRD (1963)
2 12 ANGRY MEN (1957)
3 KRAMER VS. KRAMER (1979)
4 VERDICT, THE (1982)
5 FEW GOOD MEN, A (1992)
6 WITNESS FOR THE PROSECUTION (1958)
7 ANATOMY OF A MURDER (1959)
8 IN COLD BLOOD (1967)
9 CRY IN THE DARK, A (1988)
10 JUDGMENT AT NUREMBERG (1961)
EPIC
1 LAWRENCE OF ARABIA (1962)
2 BEN-HUR (1959)
3 SCHINDLER'S LIST (1993)
4 GONE WITH THE WIND (1939)
5 SPARTACUS (1960)
6 TITANIC (1997)
7 ALL QUIET ON THE WESTERN FRONT (1930)
8 SAVING PRIVATE RYAN (1998)
9 REDS (1981)
10 TEN COMMANDMENTS, THE (1956)