Hitchcock - 29
Criterion Wrong Men and Notorious Women (5)
Warner Signature Collection (9)
Universal Masterpiece Collection (14)
To Catch a Thief

Kurosawa -8
Criterion Four Samurai Classics (4)
Rashomon
Throne of Blood
Kagemusha
Ran

Corman - 8
The Raven
The Tomb of Ligeia
Masque of the Red Death
The Haunted Palace
Tower of London
The Premature Burial
The Pit and the Pendulum
House of Usher

Hitchcock:
Warner Signature Collection (9)
Universal Masterpiece Collection (14)
To Catch a Thief
Notorious
Spellbound
39 Steps

Kurosawa:
Seven Samurai
Yojimbo
Sanjuro
Hidden Fortress
Ikiru
Ran
Throne of Blood
Bad Sleep Well
Stray Dog
High And Low
Rashomon
Kagemusha
Lower Depths

Scorsese:
Warner and MGM box sets
Scorsese Blues set

I've not done an official count, but I'd have to guess that my top 3 is:

Hitchcock
Kurosawa
Chaplin

Hitchcock
Carpenter & Spielberg are even
Eastwood

Off the top of my head I'd guess.........

Hitchock, Herzog, and either Bergman, Ford, or Kurosawa coming in at number three.

I'll put it this way - Terrence Malick is in an eight-way tie for second place, and I don't even own all of his movies.

(Hitchcock is in 1st, btw, with a whopping four titles.)

Limiting myself to each film's credited director(s), and excluding shorts, here are my Top 10:

26 Alfred Hitchcock
16 Ingmar Bergman
16 Krzysztof Kieslowski (counting each Dekalog film individually)
13 Luis Buñuel
13 John Ford
13 Jean Renoir
11 Fritz Lang
10 Charles Chaplin
10 Howard Hawks
10 Yasujiro Ozu

Bergman, Ingmar - 12
Godard, Jean-Luc - 11
Renoir, Jean - 10

Things have changed a little recently:

Martin Scorsese (6)
Taxi Driver: Collector's Edition
Raging Bull: Ultimate Edition
GoodFellas: Special Edition
Casino: Special Edition
Gangs of New York: Special Edition
The Aviator

Quentin Tarantino (5)
Reservoir Dogs: 10th Anniversary Edition
Pulp Fiction: 10th Anniversary Edition
Jackie Brown
Kill Bill, Vol. 1
Kill Bill, Vol. 2

Steven Speilberg (5)
Jaws: 30th Anniversary Edition
Schindler's List
Catch Me If You Can
Minority Report: Special Edition
Munich

Wes Cravem (8)

- Cursed
- The Hills Have Eyes
- Nightmare on Elm Street
- Red Eyes
- Scream 1-3
- Wes Craven's New Nightmare

Richard Donner (5)

- Goonies
- Lethal Weapon 1-4

James Cameron (4)

- Aliens
- Terminator 1&2
- Titanic

Hughes (4)

- Breakfast Club
- she's Having a Baby
- Sixteen Candles
- Weird Science

John Carpenter (4)

- Big Trouble in Little China
- The Fog
- Halloween
- The Thing

George Ramero (4)

- Night
- Dawn
- Day
- Land


I didn't Count TV Episodes...

1.) Hitchcock: I have pretty much everything except the OOP Paradine Case DVD.
2.) Kubrick: Everything.
3.) Chaplin: Everything except the Keystone comedies.

1. Alfred Hitchcock 35 films

2. Oliver Stone 15 films

3. Martin Scorcese 9 films

STEVEN SPIELBERG (23)
Duel
The Sugarland Express
Jaws
Close Encounters of the Third Kind
Raiders of the Lost Ark
E. T.
Poltergeist (Tobe Hooper, my butt)
Indiana Jones and the Temple of Doom
The Color Purple
Empire of the Sun
Indiana Jones and the Last Crusade
Jurassic Park
Jurassic Park 2
Schindler's List
Amistad
Saving Private Ryan
A. I.
Minority Report
Catch Me if You Can
The Terminal
War of the Worlds
Munich

RIDLEY SCOTT (8)
Alien
Blade Runner
Legend
Thelma & Louise
Gladiator
Hannibal
Black Hawk Down
Kingdom of Heaven

TIM BURTON (9)
Batman
Edward Scissorhands
Batman Returns
Ed Wood
Sleepy Hollow
Planet of the Apes
Big Fish
Charlie and the Chocolate Factory
The Corpse Bride

Akira Kurosawa 13:
Kagemusha
Ran
The Hidden Fortress
Seven Samurai
Redbeard
Rashomon
Sanjuro
Dodes ka den
Ikiru
Stray Dog
Drunken Angel
The Bad Sleep Well
High & Low

Martin Scorsese 10:
Bringing out the Dead
Casino
The Color of Money
Gangs of New York
Goodfellas
Kundun
Mean Streets
Raging Bull
Taxi Driver
Cape Fear

Sergio Leone 6:
Once Upon a Time in the West
Once Upon a Time in America
The Good, The Bad and The Ugly
Fistful of Dynamite
Fistful of Dollars
For a Few Dollars More

More than two feature films... Because I haven't got much.

Ridley Scott:
Alien
Black Hawk Down
Gladiator
Kingdom of Heaven

Hayao Miyazaki:
Howl's Moving Castle
Porco rosso
Spirited Away
Totoro

Steven Spielberg:
Indiana Jones
Jurassic Park
Munich
Saving Private Ryan

Spielberg
Hitchcock
Scorsese

Alfred Hitchcock: 31
Werner Herzog: 14
Stanley Kubrick: 12

According to DVDspot this is my top five.

Steven Spielberg (17)
Alfred Hitchcock (11)
Martin Scorsese (11)
Stanley Kubrick (10)
Akira Kurosawa (10)

I really wish you guys hadn't made me look. My smallish 200 or so DVD Collection is filled with great Directors from the past and present. Which Director comes out on top?

Richard Donner? (7)
Steven Speilberg (6)
Peter Jackson (5)

I think I need to start working on the Alfred Hitchcock part of my collection.

I honestly don't feel compelled to expand my Alfred Hitchcock collection merely because he's on the top of most user's lists here. My top three are my three favourite directors.

David Lynch
David Cronenberg
Kiyoshi Kurosawa (the other Kurosawa)

HAYAO MIYAZAKI (11):
Howl's Moving Castle
Spirited Away
Princess Mononoke
On Your Mark
Pom Poko
Kiki's Delivery Service
My Neighbor Totoro
Castle In the Sky
Nausicaä of the Valley of the Winds
The Castle of Cagliostro
Little Norse Prince

EMIR KUSTURICA (7):
Life Is a Miracle
Black Cat White Cat
Underground
Arizona Dream
Time of the Gypsies
When Father Was Away on Business
Do You Remember Dolly Bell?

TERRY GILLIAM (5):
12 Monkeys
The Adventures of Baron Manchausen
Brazil
The Meaning of Life
Monty Python and The Holy Grail

STEVEN SPIELBERG (7):
Minority Report
A.I.
Saving Private Ryan
Schindler's List
Indiana Jones and the Last Crusade
Indiana Jones and the Temple of Doom
Indiana Jones and the Raiders of the Lost Ark

RIDLEY SCOTT (6):
Kingdom of Heaven
Black Hawk Down
Gladiator
Legend
Blade Runner
Alien

SAM RAIMI (5):
Spiderman 2
Spiderman 1
The Quick and The Dead
Army of Darkness
Evil Dead 2

For the record, I don't feel compelled to expand my Alfred Hitchcock collection because he's on the top of most users lists here.

I feel compelled because he IS one of my top 3 favorite directors who's movies I don't happen to own on DVD for some reason.

An interesting question, as I have never really sat down and counted how many I have by what director. A quick look-through count and not counting duplicate versions:

John Waters :10
David Lynch :10
Kevin Smith :6

I have many that count in at 5, including: Sergio Leone, Stanley Kubrick, and John Woo...I just haven't gotten around to replacing everything I had on VHS yet.

I would have to do some research to be sure that Lo Wei, Yuen Wo Ping, or even Jackie Chan didn't have at least 6 and place 3rd on my list.

Martin Scorsese (15):

After Hours
Alice Doesn't Live Here Anymore
The Aviator
Boxcar Bertha
Cape Fear
Casino
Gangs Of New York
GoodFellas
The King Of Comedy
The Last Waltz
Mean Streets
New York, New York
Raging Bull
Taxi Driver
Who's That Knocking At My Door?

Steven Spielberg (13):

A.I.: Artifical Intelligence
Catch Me If You Can
Close Encounters Of The Third Kind
Duel
E.T. The Extra Terrestrial
Indiana Jones And The Raiders Of The Lost Ark
Indiana Jones And The Temple Of Doom
Indiana Jones And The Last Crusade
Jaws
Jurassic Park
The Lost World: Jurassic Park
Minorty Report
Saving Private Ryan

Mel Brooks (11)

The Producers
The Twelve Chairs
Blazing Saddles
Young Frankenstein
Silent Movie
High Anxiety
History Of The World Part I
Spaceballs
Life Stinks
Robin Hood: Men In Tights
Dracula: Dead And Loving It

Others:
Tim Burton (10)
Robert Zemeckis (9)
Oliver Stone (8)
Brian De Palma (8)
John Landis (7)
A whole bunch at 6