Hmmm. I'd have to do some thinking about it. One-by-one...
1960s - Before I was born. Nice styles, interesting shows, some interesting movies, not my type of music but not bad. Gutted by social inequality and violent social turbulence. Breaking away from rigid, outdated mores made you a "rebel". Sorry, but no. I'll stick watching vintage material or Mad Men for my fix.
1970s - I didn't really live through this decade either. Being born in 1979 doesn't count. It does no good if I can't remember it. Better music, better movies, so-so shows, and styles that are all over the map. At least they weren't inhibited. You have to give them credit for that. Social mores start to become like today. The good and bad cancel each other out.
1980s - Great music, good movies, terrible shows. Fashion starts off mediocre but gets keeps getting better and better throughout. The first decade I can remember. My childhood wasn't bad but I wouldn't want to be a kid again. Nice to see the Cold War ended. Thumbs up.
1990s - I'm more selective about the music, the movies mostly aren't my thing, shows are a lot better. Fashion was a mixed bag. Given how trivial all the news seemed, things were pretty good. Great for the world but less so for me. Unfortunately, I hated my teens.
2000s - The music depends on the genre, a lot of the movies were great. Good TV was really good, we won't go into the bad. Fashion improved and got sloppier at the same time. The economy wasn't that great but technology gave easier access to things than ever before. I liked my 20s.
I guess I have to go with the '00s, with the '80s as a runner-up.
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I'm glad the 2010s weren't a choice. It's obviously too early to pass judgment on an entire decade when we're only a quarter of the way through but it's not too early to say that the bad economy sabotaged it from the start.