Real Genius. I almost cried for joy when I saw it on DVD.
Ferris Bueller, The Breakfast Club, can't go wrong with either one of those. Back to the Future, pure unadultered goodness.
One I can't believe hasn't been mentioned yet: The Blues Brothers!!!
I also just love the music from 80s movies. "Everybody wants to rule the world" at the end of Real Genius, "Don't You (Forget About Me)" at the end of The Breakfast Club, I just love them.
I wish I could've seen the 80s. Except maybe the fashion, which still cracks me up (DonJohnsoninMiamiVicelollersnort)