Very close between 'Grease' and 'Ghost'.

Favourite Star Trek movie is Star Trek IV: The Voyage Home.

Love me some Ghost. Whoopi was awesome in that.

There's so many lol, I'd tell you about one of them I just watched the other day, but then I'd be breaking the first 2 rules ;).

I don't think there is a movie I've seen before that I would stop to watch again.
For example, the gf put "Scent of a Woman" on a few nights back. I sat silently watching and thinking, "this doesn't live up to the old marketing hype or my previous impression." Huya!
However, my answer does seem odd coming from someone that will spend hours running the same forms/code over-and-over again (testing for any little bug that may have escaped previous notice).

It is "Shawshank Redemption" for me. You know, with my day job and all.

Great movie. I need to watch that again. I saw it once when it first came out (in a... gasp... theater... remember those?) and had no idea at the time what a cultural icon it would become.

I also like anything by John Carpenter. 'Christine' is a classic.

He's got some great movies. Loved Christine, Escape from NY, Big Trouble in Little China, They Live. Classics.

Escape from LA... one of the worst movies ever made, though.

@Richard, you mean a theater that isn't in your basement? As in pay $15 for a tub of popcorn and another $10 for two medium sodas?  And after 1/2 hour your back is killing you from the seats. I was just telling the gf about big theaters, a few in my hometown of Santa Barbara that had ornate interiors, false sky and even a huge pipe organ in the front corner. We could see two Saturday matinees for 25 cents (destroys the cent symbol here for some reason, you know the one that looks like a c with a vertical line going through it) and the candy was another 25 cents. Best weekend babysitter a working mom could ask for.

Kingpin

Grown Ups

Thomas: yeah, this was the early 90s, so I was a broke 20-something year old. I probably saw it at "the dollar show" and popcorn and soda probably cost $2 each at the time. So I probably got out of there - with my date - under $10 all day... which was a steal. LOL.

Today, the only theater we'll go to is one about an hour away in Naples FL that has the nice big comfy recliner seats and they'll actually bring food (and beer/wine) to you. Can't get out of that movie for under a Benjamin though. LOL.

But yes... I'd rather watch a movie at home. You can pause whenever you want to peeeeeeeee.

I've seen too many films to name a favorite.  I see about 100 new films a year (not necessarily the latest films).  Additionally, I often rewatch the ones I've already seen.  I buy lots of movies on disc and the cloud just to be able to rewatch them.  I also go to theaters a few times a year, usually for old films.

But for a majority of films, seeing once is enough, even great ones.  I love Shawshank Redemption, but I only saw it once, when it first came out.  It is a variation of the "Return of Monte Cristo" story, which has been made into tons of films and TV shows.

Sometimes, films that I've seen numerous times are not necessarily great ones, such as many guilty pleasure films, experimental films, "exploitation" films, etc.  Seeing someone's artistic expression (good, bad, outlandish) is a memorable experience in itself.

In 2011, two films were released that had the same subject matter: a planet on a collision course with Earth.  I saw both films ("Another Earth" and "Melancholia") even though I knew both were mediocre.  If a film has a director and/or subject matter that intrigues me, I see it regardless.

Sometimes, a film that I initially thought was mediocre grows on me, until it becomes a favorite.  The opposite can be true too: a previously favorited film falls out of favor.  I used to love "Butch Cassidy and the Sundance Kid" (1969) and see it repeatedly, but have since liked it less -- when the two guys go to Bolivia, the film just runs out of steam and isn't as exciting as the earlier portions.

But I do love the other Redford-Newman film, The Sting (1973), and I still watch it often.  It's fun, well-made, and hugely influential to all the con artist movies made since.

And there are films that I see repeatedly just to be depressed, because they are well-made and have important subject matters.  "The Thin Blue Line" (1988) is a documentary about a wrongly-accused man in death row, who was later set free because of the info uncovered by this film.  "O.J.: Made in America" (2016) is the Oscar-winning 8-hour documentary on O.J.'s life and trial, and so much more.  Clint Eastwood made the terrific 2008 docu-drama "Changeling", about a mother's search for her missing son amidst corruption and cover-ups.  

And then, there are films that manage to "puzzle" and confound my senses; they linger in my mind and compel me to watch them repeatedly.  Films like "Mulholland Drive" (2001), "Picnic at Hanging Rock" (1975), "Images" (1972), and many others use "dream logic" to tell their enigmatic and fascinating stories.

I've watched Oliver Stone's "JFK" (1991) many times even though I don't believe in any of those conspiracy theories.  The film, if nothing else, captures the chaos, paranoia, apprehension, etc., of that era very memorably.

That is definitely a wide range of films. Thanks for sharing.

Possibly two extremes...
Twelve Angry Men with Henry Fonda
Pulp Fiction "The path of the righteous man is beset on all sides by the inequities of the selfish and the tyranny of evil men..."

Both great movies.

I love "Twelve Angry Men" too.  But the plot is a little "convenient" at times -- an identical knife, the guy forgetting the movies he saw, the marks on his nose, etc.  But the central message of having an open mind is timeless and important.  I've seen at least three other versions of this story.  The original TV broadcast in the 50s, the 1997 TV version with Jack Lemmon in the Henry Fonda role, and the 2007 Oscar-nominated Russian film called "12".

Twelve Angry Men, The Godfather, Apocalypse Now, The Empire Strikes Back, The Wrath of Khan.

Practical Magic

Great choice Sandra. Love any movie that features Sandra Bullock. 'The Net' is another favourite of mine.

Miss Congeniality.... Only because it had The Shat.

I'm a huge movie buff, so this question always excites and stumps me at the same time. It's too hard to just name ONE movie! I don't even think in terms of individual movies anymore...my brain only recognizes franchises. And sub-genres.

I love...
Sci-fi (Star Trek, Star Wars, Matrix, Planet of the Apes, etc)
Fantasy (Lord of the Rings/Hobbit, Princess Bride, Narnia, Harry Potter, etc)
Superheroes (DC, MCU, X-Men, etc)
Action (Indiana Jones, Jason Bourne, Rambo, Rocky, etc)
Baseball (Field of Dreams, For Love of the Game, 61*, the Natural, 42, Fever Pitch, Eight Men Out, etc)

But my all-time favorite genre in any medium (movie, show, books, games...) is anything that deals with Time! Time travel or manipulating time in other ways has always intrigued me (ever since I was 8 years old in 1985!)

So, Back to the Future, Terminator, Star Trek, Frequency, Time Traveler's Wife, Edge of Tomorrow, Tenet, 12 Monkeys, Everything Everywhere All at Once, Meet the Robinsons...just to name a few.

I'm with you. Time travel movies have always been my favorite.

Are you more of a "butterfly effect" or "ripple in the pond" guy? In other words, if you go back and time can any minor change have a butterfly effect and completely throw off the future, or is it more like a ripple in a pond where it will eventually smooth out and the future will tend to unfold mostly as it did before?

Timestalkers with William Devane and Lauren Hutton.

Timecop, now that has it all

"Interstellar" is a great sci-fi film showing the effects of time dilation.  At one point, we see the protagonist stuck in a tight space, but has "access" to past and present events in his life.  This is opposite to what we have normally: we have freedom in space, but are stuck in one direction with time.

Then we have films that have non-linear storytelling with flashbacks, flash forwards, and sudden time shifts.  The most notable of that is probably "Citizen Kane" (1941).  The story begins at the end, then goes back to the beginning, then to the end again, then hops around the time line several times.

"Memento" (2001), directed by Christopher Nolan, tells a story with a completely broken-up time line.  If the story's chronology is A to Z, then "Memento" tells the story in this order: Z, A, Y, B, X, C, W, D, V, E, .... until the two time lines converge in the middle: L, Q, M, P, N, O.