For me, the best decade was the 1970's.
As a kid, growing up on Long Island was great in the 70's. We never locked our house. Cars could be parked in the driveway with the keys in the ignition. You could leave the house at 9 o'clock in the morning and your folks wouldn't see you again until the sun was going down, at the earliest, and they didn't worry about you an iota throughout the course of the day.
Mom was a housewife and Dad was a truck driver who made more than enough to support a family of four. My $1.00 weekly allowance was enough to get me into a Saturday movie and maybe buy a couple candy bars and still have money left over. We'd set up a ramp, put a baseball card in the spokes of the Schwinn, and we were Evel Fucking Knievel.
We'd go to neighborhood cookouts on the 4th of July and then go watch the fireworks show at the high school. We'd march in the local Memorial Day parade with our boy scout troop and then go to the local volunteer fire department's annual barbeque.
And it was all free.
So, yeah, for me it was the 1970's.
Sadly, I think we're living through the worst right now...