Personally I think that the 80s has the best music and the 70s with a very close second. Worst I would definitely say 2010s I like almost nothing from there except metal bands and the occasional EDM producer.
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90s to 2000s have some great stuff 70s and 80s are kinda mixed bags for me 2010s have generally been an awful musical decade (I abhor rap/hip hop/pop)