The decade we have the fondest memories of.
I remember all of my decades with fondness. Particular years, some not so much
For me it was the 50s and first half of the 60s. But, I remember well my grandmother back then recalling the first decade of the 1900s and the 1920s and how much better it was then.
They are all good except the last one.
Since I can only talk about 2000's and 2010's I prefer the first, the music was way better in the early years