Listmania!
The Best Movies Which Are Not Adaptations
By an Amazon.com customer
Sympathy for Mr. VengeanceSympathy for Mr. Vengeance
Buy new: $17.99 / Used from: $3.59
Not quite as good as Park Chan-wook's second film in "The Vengeance Trilogy," Oldboy, but Oldboy is based on a comic (which I haven't read), and this film is also really fantastic.
Shaun of the DeadShaun of the Dead
Buy new: $9.49 / Used from: $4.50
If you love zombies, and you love British comedy, there really is no reason not to like Shaun of the Dead.
Lucky Number Slevin (Widescreen Edition)Lucky Number Slevin (Widescreen Edition)
Buy new: $6.99 / Used from: $1.69
I think anyone who likes dark comedy, action, and really well done twists, would like this movie. Kind of Pulp Fiction-esque.
Seven (New Line Platinum Series)Seven (New Line Platinum Series)
Buy new: $23.49 / Used from: $1.49
Fantastic, moody, gruesome and somewhat thought-provoking murder mystery/detective story.
Reservoir Dogs (15th Anniversary)Reservoir Dogs (15th Anniversary)
Buy new: $12.49 / Used from: $3.69
My favorite Quentin Tarantino film. A story of the aftermath of a bank heist gone wrong.
Donnie Darko - The Director's Cut (Two-Disc Special Edition)Donnie Darko - The Director's Cut (Two-Disc Special Edition)
Buy new: $16.49 / Used from: $4.99
Dark, vague thriller and/or sci-fi. Depending on how you want to interpret it.
Porco RossoPorco Rosso
Buy new: $22.99 / Used from: $3.57
This one is really different from any of my other favorites. Minimal family friendly violence, fairly light. In fact, it may be because of this that I like it so much. It's really nice as a pleasant relaxing break.
Memento (Widescreen Two-Disc Limited Edition)Memento (Widescreen Two-Disc Limited Edition)
Buy new: $19.94 / Used from: $3.93
Technically it's based on a short story by the screenwriter's brother. However, the story was written more as a first draft to get ideas for the screenplay, and it's really good, so I'm going to say it counts.
Hot Fuzz (Widescreen Edition)Hot Fuzz (Widescreen Edition)
Buy new: $12.49 / Used from: $1.95
Not as good as Shaun of the Dead, and part of a genre which has been done a lot more, the comedy police movie, Hot Fuzz is still fantastically funny and blows any other cop spoof movie out of the water.
In BrugesIn Bruges
Buy new: $9.49 / Used from: $2.45
Another dark comedy featuring guys with guns and violence. This really seems to be a theme here.
Pulp Fiction (Two-Disc Collector's Edition)Pulp Fiction (Two-Disc Collector's Edition)
Buy new: $10.99 / Used from: $7.35
As previously alluded to, I actually like Reservoir Dogs better than Pulp Fiction, unlike what seems to be the popular opinion. However, Pulp Fiction is still also really fantastic.