Not all of these are movies.  Some are TV shows, even books.
This is just a rough draft list of generally nifty stuff.
A few of them qualified by being so bad they're good. :)
In cases where the item has sequels, we mean all of the
sequels unless it specifies which ones.

Trust
My Dinner With Andre
The Big Bang
2001: A Space Odyssey
The End of the Affair
The Prophecy
The Breakfast Club
Some Kind of Wonderful
Babylon V
La Femme Nikita
Heartbreakers
Fight Club
Clutch
Phantasm
The Prisoner
The Matrix
Dark City
Field of Dreams
What Dreams May Come
Dead Poets Society
3:15 The Moment of Truth
Band of the Hand
Event Horizon
Star Trek (TOS,I-IV,VI)
Dune
Alien
Dilbert
Cube
Brainstorm
Dreamscape
The Fury
Firestarter
The Langoliers
Omega Doom
Enemy Mine
Big Lights Bright City
Never Been Kissed
Vibes
Merry Christmas Mister Lawrence
Saving Private Ryan
Blackhawk Down
Absence of Malice
Three Days of the Condor
Marathon Man
They Live
The People Under The Stairs
The Chronicles of Narnia (books only)
Green Eyes
Psion
Protector
The Color of Distance
Deja Vu
Constantine
Dawn of the Dead
Spectreman
Planet of the Apes
Tripods
Flowers For Algernon (book and movie)
The Terminal Man
Omega Man
Contact
Tales From A Parallel Universe
Foxes
THX 1138
Schindler's List
Gormenghast
The Green Mile
The Right Stuff
Apollo XIII
Last of the Mohecans
Pink Cadallac
From the Earth to the Moon
City of Joy
Beyond Rangoon
Bladerunner
Mean Guns
Enemy of the State
The Twilight Zone
Max Headroom
The Patriot
The Shawshank Redemption
The Indian In The Cupboard
Megaville
Sixteen Candles
The Haunting
The 4th Floor
On The Beach
Oleanna
Splendor In The Grass
Butterflies Are Free
Over The Edge
Assault on Precinct 13
The Incident
To Live And Die In LA
The Parallax View
Seven
Unbreakable
Brubaker
Falling Down
To Sir With Love II
Frequency
Castaway
Bless the Child
Klute
Scanners
Powder
The Cell
Ghost
Duel
Kill Bill
Who'll Stop The Rain
The Suicide Club
Hell In The Pacific
Equus
The Last Castle
Rolling Thunder
Training Day
Blast From The Past
Battle Royale
Macross
Fruits Basket
Nausicaa of the Valley of the Winds
I Robot
Primer
The Cat Returns
Spirited Away
Howl's Moving Castle
Hex
Voices of a Distant Star
Cat Soup
Donnie Darko
AI
White Dog
The Handmaid's Tale
The Last Samurai
Fahrenheit 451
V For Vendetta
The Island of Doctor Moreau
Fantastic Planet
Sharon Shinn's "Samaria" series
Wolf's Rain
The Lost Room
The Fountain
Jeremiah
Children of Men
Haibane Renmei
Undertow
Five Centimeters Per Second
Ghost in the Shell II
Solaris
Code 46
eXistenZ
True Blood
The Unbelievable Truth
World Builder (YouTube)
I Am A Strange Loop (book)
Knowing
City of Angels
Pretty In Pink
Surviving Desire
Simple Men
Amateur
Avatar
Supersize Me
Full Metal Alchemist
Mermaid Forest
Idiocracy
Network
King of Thorn
The American President
King of Thorn
Destination Void (book series)
The Boy in the Striped Pajamas
Inception
Hunger Games
Endless Love

Ghostbusters
One Night Only
Rush Week
Windy City
Tron
Back To The Future
WKRP In Cinncinati
Tomboy
The Bride
Doc Hollywood
Vigilante
Valley Girl

Gladiator
Braveheart
Battlestar Galactica
Star Wars
Pitch Black
The Andromeda Strain
Foul Play
Outland
The Hidden
The Forgotten
U-571
Das Boot
The Hunt For Red October
The Bone Collector
Terminator
Deep Blue Sea
Sphere
Mimic
Wallace & Gromit
Chicken Run
Escape From Alcatraz
The Abyss
Love & Bullets
Coma
Groundhog Day
Tremors I
Proof of Life
Detour To Terror
The Falcon & The Snowman
K19: The Widowmaker
Ronin
The Ring
Doctor Who
Fearless
Lifeforce
Mary Bloody Mary
Saturn 3
The Space Giants
Descent
Aeon Flux
Ultraviolet
Equilibrium
Zardoz
Poseidon (Adventure)
The Land That Time Forgot
Gattica
The Dark Crystal
The Bourne Identity
The Wicker Man
The Recruit
Premonition
The Island
Odyssey 5
Tin Man
Apocalypto
I Am Legend
Thirty Days of Nights
Firefly / Serenity
Batman: The Dark Knight
The Happening
Blindness
Cloverfield
Shooter
Underworld
The Tudors
Farscape
2012
Alice (SciFi Channel)
The IT Crowd
Vampires
Tank
District 9
Daybreakers
Thor
Perfume: The Story of a Murderer

The Thirteenth Floor
Vanilla Sky