Amadeus
Star Wars: Return of the Jedi
Nausicaa of the Valley of the Wind
The Karate Kid
Purple Rain
2010: The Year We Make Contact
Back to the Future 1+2
Top Gun (saw this one in theatres!)
Laputa: Castle in the Sky
Stand by Me
Spaceballs
Full Metal Jacket
My Neighbor Totoro
Big
Akira
Rain Man
When Harry Met Sally

Fast Times at Ridgemont High
Back to the Future
School Daze
She's Gotta Have It
Purple Rain
48 Hours
Beverly Hills Cop
Weird Science
Wildstyle (Duh!)
Transformers: The Movie
This Is Spinal Tap

OH GAWD XD

Short Circuit
Tango and Cash
The Terminator
Scrooged
Spaceballs
Tron
Strange Brew
They Live
UHF
Uncle Buck
Wargames
Weekend at Bernie's
Top Gun
Robocop
Police Academy
The Neverending Story
National Lampoon's Vacation
Mad Max: Beyond Thunderdome
Legend <Tim Curry is the Devil! XD)
The Last Starfighter
Little Shop of Horrors
Lethal Weapon
Starman
Krull
K-9
Innerspace
The Goonies
Gremlins
Little Monsters
Ghostbusters (I and II)
Full Metal Jacket
The Dark Crystal
D.A.R.Y.L. (Data Analyzing Robotic Youth Lifeform)
Back to the Future (I & II)
The Beastmaster
Beetlejuice
Beverly Hills cop (I & II)
The Abyss
48 Hrs
Airplane (I & II)
...

And a few others XD, all the ones I could remember off the top 'o my head ^^

The Karate Kid
The Karate Kid 2
The Karate Kid 3
Footloose
Grease (or is that more 70's?)
Ghostbusters

Rocky Horror Picture Show

Definitively the Star Trek Movies (II - V), Ghostbusters, E. T. of course, Back to the Future, Big.... those were real great movies.
There are also some Music-Films which were bloody damn great, one to name here is "moonwalker".

All the John Hughes movies
Ghostbusters 1 and 2
The Goonies
The Princess Bride
Neverending Story
An American Tail
Secret of NIMH
The Land Before Time
Stand By Me
Rain Man
Cocoon
Real Genius (LOVED this!!)

THE THING
Big Trouble in Little China
Aliens
The Empire Strikes Back
The Wrath of Khan
An American Werewolf in London
Raising Arizona
Blade Runner
Fright Night
Ghostbusters
The Terminator
Beetlejuice
This is Spinal Tap
The Evil Dead 2
Predator
Little Shop of Horrors
Altered States
The Fly
A Nightmare on Elm Street

n' that's jus' a few.....

My Science Project.

No one ever remembers that one ;)

Short Circuit
Back To The Future
Star Wars
Lethal Weapon
The Brave Little Toaster

Gah, I could go on forever. Lots of good ones mentioned so far!

OMG! Brave Little sdgkljahjdghsajk <3

Airplane!
Back To The Future
Bill Cosby - Himself
A Christmas Story
Ferris Bueller's Day Off
Ghostbusters
The Goonies
Grave Of The Fireflies
Johnny Dangerously
The Karate Kid
Kiki's Delivery Service
My Bodyguard
My Neighbor Totoro
9 To 5
The Outsiders
Pee-Wee's Big Adventure
Poltergeist
Romancing The Stone
The Secret Of NIMH
The Shining
Splash
Stand By Me
Suburbia
Three Amigos
Twilight Zone: The Movie
UHF
WarGames
Who Framed Roger Rabbit?

a couple I forgot:

The Empire Strikes Back
Raiders Of The Lost Ark

good gravey do I have a lot of favorite 80's movies, well here's a small list that I can think of off the top of my head:

the secret of nimh
the back to the future trilogy
the super mario brothers movie
a nightmare on elsm street
fastimes at ridgemont(sp?) high
childs play
the blues brothers
this is spinal tap
oliver and company
pink floyd's the wall
spaceballs
caddyshack
uncle buck
little monsters
the labyrinth
the rescuers
the indiana jones trilogy
big
the princess bride
who framed roger rabbit
both of the ghostbusters movies
the goonies
the lost boys
beetle juice
the neverending story
eddie and the cruisers
short circuit 1&2
UHF (weird al FTW!!)
legend
the brave little toaster
airplane
a christmas story
twilight zone the movie
three amigos
peewee's big adventure
ferris bueller's day off
the shining
stand by me
an american tail
little shop of horrors(just gotta love that audrey 2 )
the land before time(cried so hard)
the teenage mutant ninja turtles movie(I know this came out in 1990 but the look and feel of this movie just screams 80's to me)
day of the dead
scrooged
groundhog day

and many, MANY more that I can't think of right now
man, the 80's had so many great movies.

Ghostbuster
Back to the future
Jurassic Park
Oliver and Company
Scrooged
Beetlejuice
The Princess Bride
Indiana Jones
Ferris Buellers's Day off
Star
Splash
The Shining
The Sixth Sense (I think that was 80s)
Spaceballs
The Terminator
Star Trek: the Voyage Home

And SO MANY MORE!!!!!!