I don't have a favorite decade, but I do have a least favorite decade - 1960s. That's when the post-WW2 baby boomers in America grew up and somehow turned an understandable anti-war movement into a general rebellion against tradition, moral values and social responsibility. And because the USA was/is the leading superpower of the Western world, the so called Sexual Revolution spread across the world and ruined the modern world I was born into.
I look at fashion, music, lifestyle and culture and think I was born at least 50 years too late!