Five films you watched when you were a teenager that've stayed with you.

[Chipsandsalad]

Mine are,
The Deer Hunter - really shook me up and stayed in my head for a long time.
The Exorcist - watched it in secret with my big sister, it terrified me and I couldn't sleep for weeks.
The Sound of Music - the whole family watched it together every Christmas, so it just makes me feel good.
Good Morning Vietnam - fell in love with Robin Williams.
Thelma and Louise - girl power, and Brad Pitt, enough said.

The Goonies
The Princess Bride (can't wait for DD to watch this one!)
Stand By Me
the Shawshank Redemption ( yes there's a Stephen King bias here)
Pulp Fiction
Thelma & Louise
Interview With A Vampire
Can watch all of these over and over. There are plenty more but had to stop there or I'd be going on forever!

Everything Disney up to 1998!
The Goonies (can recite verbatim and had a crush on "Mouth")
Se7en (watched it at a sleepover aged 13?, my parents were horrified when I got home and threatened to ring the parents to complain..)
Dirty Dancing.. the first adult film I watched aged about 10 at a friend's house. I didn't understand half of what was going on and thought Penny had a tummy upset not an abortion..
Indiana Jones 1/2/3

Arachnophobia had a massive impact in me after watching it at a sleepover. I still can't put my hand in popcorn, get in the shower, open a box of cereal without the thought of a man eating spider jumping out at me melodramatic

On a happier note, Grease (remember singing it endlessly in the school play ground).

3 men and a baby is my mum's favourite film so I remember seeing that at the cinema when I was v young.

Coyote Ugly was a big hit for me as a teenager but I've never had high brow tastes!

Personally I grew up watching films from the '30's-60's mainly on BBC2. In those days modern films were only a/v at the cinema so I was exposed to films from other eras with the social mores of the times, warts and all, that today's youngsters with niche marketing will never come across. I think that's a shame. Even a lot of the films that people mention here are rarely if ever shown on terrestrial/freeview channels.

Children of a Lesser God
Mandy (old film I saw on TV about a deaf child called Mandy)
Sister Kenny ( another film I saw on TV about a nurse who found a cure for a type of childhood paralysis)
carry on films
Aliens

JFK - had to watch it for modern studies class at school and the whole JFK shooting / conspiracy thing stuck in my mind for a while

Threads - the nuclear aftermath story, again , shown on the jumbo telly on wheels in Modern Studies class. Gave me nightmares for years!
Jurassic Park - I remember being wowed by the special effects.

Titanic - went to see it twice, with my boyfriend of the time and cried buckets.

Ha , also was very afraid of Critters !
I used to make sure my feet were not dangling out of the side of the bed just in case a rolling , hungry critter had a bite!
Wasn't there a scene where someone was dangling out of a bed and got crittered ?

Grease
It's a Wonderful Life
Sophie's Choice
Saturday Night, Sunday Morning
Zulu

Carry on screaming! I absolutely loved that film - still do actually.

Dead Poets Society
Legends of the Fall
Weekend at Bernie's
Pretty in Pink
Beaches

These are the films I saw as a teenager and still love today...
Usual Suspects
Dirty Dancing
Love Story
The Goonies
Cocktail
Pretty Woman
Flashdance
Fame
Point Break
Breakfast at Tiffany's

Sorry couldn't keep it to five!!

Dead poets society
Letter to Brezhnev
Alien
The haunting (1964)
Breakfast at Tiffany

However in could equally say

Poltergeist
Rear window
Beaches
Out of Africa
Sophie's choice

Might have to add in An Affair to remember even though I first saw it long before I was a teenager.

Stand By Me (started my love of River Phoenix) - I do think this film is a classic and can recite the script! Kiefer Sutherland was the other standout performance
The Lost Boys -RIP Corey Haim. I was gutted my second favourite teen hero also died. Amazing soundtrack and showed the potential of Kiefer Sutherland.
Ferris Bueller's Day Off - I love the sheer joy of this whole film
The Accused - my first cert 18 film
Maurice -the first film I watched with gay relationships. I bawled my eyes out at the cinema and felt that understanding you think you have as a teen.
Pretty Woman - so funny and loved Julia Roberts in her role

Stand by me
Leon
Pulp fiction
Reservoir dogs
Rita,sue and bob too

I'm more than a smidgen older than most posters on this thread, judging by the choices! (Though I did see the first four at the local film society.)
The Seventh Seal
It's a Wonderful Life
The Magnificent Ambersons
Animal Farm
West Side Story

I'm so glad someone else adores 'In the Mood for Love' as much as I do - it's wonderful.

dazzling - I saw 'The Haunting' at the cinema in '64 when I was 16, the scariest film I'd ever seen until Blair Witch.

Dirty dancing
Pulp fiction
Ghost
Stand by me
Lost boys

The Green Mile
Stand By Me
Mean Girls
Beetlejuice
Grease
Weird Science
The Breakfast Club
Forres Gump
The Shawshank Redemption
The Godfather
The Stand
Carrie
Lolita
Aladdin
Philadelphia
Big

You can definitely see my twin teenage obsessions of Stephen King and Tom Hanks in this list