There isn't a movie in this world that i can watch over and over, would soon get bored. There are thousands of good movies to see so I don't want to waste my time with re watching anything.

Dune

Gosh tha's hard because I have so many favorites! But among them are The Green Mile, Forest Gump, Mask, The Legend of Billie Jean, Beaches, and I also love horror films such as the A Nightmare on Elm Street and the Saw movies.

Hmm, more thoughts..
Forrest Gump
Green Mile
The Sting
Butch Cassidy and the Sundance Kid
Gone With the Wind
My Fair Lady
10 Commandments
Sound of Music
Lion King
Raiders of the Lost Ark
Breakfast Club
LA Confidential
Christmas in Connecticut
Holiday Inn
Quiet Man
Bad Santa
Caddy Shack
Chatty Chitty Bang Bang
The Great Race

Coming to America, goodfellas, friday, scarface, and pulp fiction

Split. Rocky Horror Picture Show. Living in Oblivion. Star Wars. Superman.

Ironically enough, it is Christmas Story.

The Burbs

The Outsiders. i can't believe i'm the first person to say it

True Romance is the other.
[imdb.com]

The Godfather, Parts 1 & 2.
The Philadelphia Story. (Just watched it again last night as a matter of fact.)
Lord of the Rings: The Return of the King.
The Wedding Date.
Flying Down to Rio.
The Quiet Man.
Excalibur.
Monty Python and the Holy Grail.
Dune.

Avatar

Slaughterhouse-Five, a 1972 movie based on Kurt Vonnegut's book of the same name. Vonnegut said of the movie:

"I love George Roy Hill and Universal Pictures, who made a flawless translation of my novel Slaughterhouse-Five to the silver screen ... I drool and cackle every time I watch that film, because it is so harmonious with what I felt when I wrote the book."

The recent classics (Gladiator, The Matrix, Alien/s, Master Commander) definitely.

For more recent films:
1: Ex Machina,
2: Contagion,
3: Spotlight (so good! It was all in the story telling, acting, cinematography, directorship, etc. The best thing is it had minimal use of music - which is used a lot of times to control/dictate your feelings.),
4: Interstellar (I like how this movie interprets our current understanding of space-time into a narrative.)

I'm a bit of a movie buff. There's quite a few others I can re-watch over and over.

Red, Red 2, any of the Bob Hope Road movies, A Christmas Story, The Princess Bride

Gotcha, The Villain, The Princess Bride, the Monty Python movies, Bill and Ted's Excellent Adventure, Ferris Bueller's Day Off, the uncut version of Caligula, and every Jimmy Stewart movie except "It's a Wonderful Life." Don't care for that one. I prefer The Man Who Knew Too Much, Rear Window, or Vertigo.

Old star wars, grease, lotr (also have read them many times), I am legend, 28 days later, most mel Brooks movies, airplane, scary movie 3, min, Monty python movies, mad Max, and the shining.

Somewhere in time

I don't feel like answering this again... it has been asked a number of times already.

All the Star Wars....all the Harry Potter....all the Hunger Games

Also:
NottingHill
Edge of Tomorrow
Both Pacific Rim films
Saving Private Ryan
Forrest Gump
Castaway

anything with Gene Kelly or Fred Astaire

and pretty much every superhero movie ever

There are a few but currently The Martian ?

The Matrix Trilogy - The Princess Bride - oh and "The Quiet Man" at least once a year on St. Patrick's Day - because my parents loved that crazy movie.

My Cousin Vinnie!

"Blade Runner"...A lot of it is the look and atmosphere. It is the same with "Casablanca", "The Maltese Falcon" and" Frankenstein".

Moulin Rouge