If you could go back in time what time period would you choose to live in?

The 60's don't actually seem that bad. I'm not sure I'd want to go further back, all romanticism aside, times before modern healthcare, hygiene etc. were pretty terrible. I wouldn't want to be too close to modern time either, the rising inequality, crunch for resources and spoiling of nature make for scary future. Besides, 60's would let me leverage my knowledge of coming centuries to lead comfortable life and perhaps even change the path of future in my timeline.