I don't like fetishing decades because every decade has examples of the best and worst of its culture. Plus I personally don't like the generalizations of "'80s movies" or "'80s music", forcefully pushing all styles and genres into one broad umbrella term...I'm getting to the age where kids are starting to do that for the '90s and it's driving me crazy: "Yeah, I love '90s music: Nirvana, Spice Girls, Marilyn Manson, No Doubt, Radiohead, Eminem...y'know, '90s music!"
But I'm not trying to be a sourpuss. The majority of my own pop culture intake comes from the '80s. I credit that entirely to the movies I watched growing up, namely genre flicks like horror, sci-fi, action, exploitation, sex comedies, etc. '80s genre flicks - studio and independent - were so much ballsier: they took more creative risks, more experimentation, had a much more vivid style. Movies weren't afraid to be too extreme or too over-the-top. I don't know if I'd use the word "optimistic", but there was definitely a sense of jubilant creative freedom and much less of the cynicism that the '90s brought. Though there were exceptions, '90s genre flicks were too drab, too restrained, too derivative and formulaic to a fault.
As far as music, guess it depends on what you listen to, but for me it was definitely a golden era for more socially-conscious genres like punk, ska and reggae, one of the few good side effects of the Reagan and Thatcher administrations. As far as the new wave and synthpop most closely associated with that era, there was also a lot of great stuff and a lot of great artists who continue to make fantastic music (Pet Shop Boys and Thomas Dolby are two of my favorites), but there was also a lot of stuff I could live without.
As for television, I can't say I ever watched too much from any decade, but the '80s did give us 'Manimal', the Simon MacCorkindale action-adventure about a shape-shifting doctor who could turn into any animal to solve and fight crime, and for that alone they win the century.