Sunshine
Begotten
Event Horizon
Evil Dead
Waking Life
Basket Case
Enter the Void (how original huh)
Akira Kurosawa's Dreams

If I remember right these are the movies I'd seen for the first time on acid. At least ones that I'm still very familiar with

I've been watching movies for days in the last like 2 years, here's some that became favorites

Paprika
Bone Tomahawk
Brazil
Deliverance
Pin... [Pin: A Plastic Nightmare]
Possession
Repulsion
The Witch
Eyes Without a Face
Ghost in the Shell

Barney's Version
Blade Runner
Paprika
A Mighty Heart
Alien
American Beauty
Towelhead
American Hustle
American Psycho
Argo
Ben-Hur (DeMille)
The Ten Commandments (DeMille)
Spartacus
Bram Stoker's Dracula
Carnage
Clouds of Sils Maria
Deconstructing Harry
Eyes Wide Shut
Kingdom of Heaven (Director's cut - it's a very different movie.)
La Grande Belezza
Last Life in the Universe
Much Ado About Nothing
Nightcrawler
No Country for Old Men
Polisse
Kriegerin
Shame
The Thing
The Nightmare Before Christmas
The Town
Melinda and Melinda
To Rome With Love
Birdman
Camp X-Ray

... plus many, many more. I watch a ton of movies.

EDIT: I forgot to mention the (probably) most ridiculous item on my favorites list. Spring Breakers!
https://images-na.ssl-images-amazon....yMTI@._V1_.jpg

I'm more of a classic movie guy.

Citizen Kane
Dr. Strangelove
Fargo
Apocalypse Now
Sunset Boulevard
Pulp Fiction
This Is Spinal Tap
Lolita (both versions- Frank Langella is a better Clare Qwilty)
A Clockwork Orange (yeah, I like Kubrick- so sue me)
Pink Flamingos (hey, I'm from Baltimore, okay?)

I have the Lolita movie with Jeremy Irons on my DVD shelf, but I have to admit I didn't exactly find it riveting. Pretty interesting, but I'm hoping that I will like Kubrick's take more.

Kubrick's is better IMO. It's not as graphic as the novel and it probably would not have been released if it had been. It's almost a comedy in a way though not really. James Mason comes off as a little more likable than Jeremy Irons but he's every bit as creepy. I'd highly recommend it.

Jeremy Irons went for serious creeper. Mason's portrayal was more pathetic than creepy in my opinion.

Pulp Fiction is certainly in my top 5.

all the movies I've given 5 stars on RYM so far

Paprika
2001:A Space Odyssey
Alien
Basket Case
Braindead
Brazil
The Cabinet of Dr. Caligari
Deliverance
Diabeł
The Elephant Man
Eraserhead
The Exorcist
The Fly
How Wings Are Attached to the Backs of Angels
Into the Wild
La jetée
The Life Aquatic With Steve Zissou
Metropolis
Mulholland Dr.
Pin... [Pin: A Plastic Nightmare]
Psycho
Repulsion
The Shining
Silence of the Lambs
Stranger Than Paradise
Suspiria
The Thing
Vargtimmen [Hour of the Wolf]
Videodrome
夢 [Akira Kurosawa's Dreams]
攻殻機動隊 [Ghost in the Shell]

there's definitely more though

These:

Kentucky Fried Movie
The Naked Gun
Baseketball
South Park: Bigger, Longer and Uncut
Team America: World Police
Half Baked
Austin Powers: International Man Of Mystery
Rush Hour
American Graffiti
The Hangover
Resevoir Dogs
Pulp Fiction
Jackie Brown
Kill Bill Volume 1
El Mariachi
A Fistful Of Dollars
For A Few Dollars More
The Good The Bad and The Ugly
Die Hard
Taken
The Terminator
The Fifth Element