Hm, definitely some time in ancient Greece. Keep in mind, I'm Hellenist, so some of this does coincide with Greek mythology.
The Golden Age is alright, though I'd rather not be under Cronus's rule. The Silver Age was pretty mild and similar, though ruled by Zeus. The Bronze Age was way too... intense. The Age of Heroes was one of the best as well as The Silver and Gold Age. The Iron Age is horrible though (the Iron Age would be more modern times). I'd have to say The Silver Age.
The Silver Age was peaceful, where men still had to work, but childhood was longer, and mankind had much longer lifespans. I'd pick the middle of the Silver Age, where Zeus had been ruler for a while, but I wouldn't be alive to be at the end of the Silver Age.