Everyone has named the obvious (Empire, Raiders, Back to the Future), so my list will be the OTHER movies that seem to get left out because it was such a great decade in movies:
1. Midnight Run - The movie is hilareous from start to finish
2. Plains, Trains, Automobiles - I think someone named it above, but the best line, "Those aren't pillows!!!!!"
3. Predator - Arnold in his prime.
4. Lethal Weapon - The sequels started to become a bit too goofy, but this was a gritty action film.
5. Sixteen Candles - John Hughes in his prime.
6. Breakfast Club - Perfect Casting.
7. National Lampoons Vacation - "This is crazy, this is crazy!"
8. Fletch - This movie always get overlooked, but is funny as hell.
9. Witness - Underrated Harrison Ford Flick.
10. The Untouchables - "They put one of your guys in the hospital, you put one of theirs in the morgue!"
11. Rain Man - One of the best dramas of the decade.
12. Fast Times at Ridgemont High - Movie still holds up today.
13. Risky Business - Teenage movies today always play down to their audience, but this does the opposite.
14. Wargames - Loved it as a kid, and another movie that is made for kids, but doesn't talk down to the audience.