Videodrome, aka the greatest Canadian film ever made.
I agree with many of the films that others have mentioned, but over all the 80s were a pretty dark decade in every way. Bad movies, bad fashion, bad drugs, bad music.
Are people just automatically nostalgic for the era they were born into? 'Cause I dig the 70s, and that's when I was born. (But also, the 70s are way cooler than all other post-war decades.)