Honestly? Present day. Sure, we've got problems. Sure, our culture is in the toilet. But it wasn't any better back then. Every period has its fair share of problems and I'm convinced that present day society has the least amount of problems.
1950's? Massive Racism and the threat of nuclear war between the USA and USSR.
1910's? Again, Massive Racism, sexism, poor medical technology, spotty law enforcement, and huge levels of corruption. Not to mention that jingoist nationalism was ALL the rage.
1920's? Same problems as 1910's, only slightly better.
1940's? Nazis and Japanese Fascists.
1950's - 1990's? USSR and Hard-line Communist China made billions of people unhappy. Now, the USSR no longer exists and China has pretty much gone full-blown capitalism mode (albeit with a severely authoritarian government - it IS possible to have a Free MARKET but not necessarily a free SOCIETY).
1800's? Plague, Polio, Napoleonic wars, and extremely primitive 'medicine'. HORRENDOUS working conditions.
1700's? Even more diseases, pirates, kings ruled much of the world and democracy pretty much didn't really exist, except in name only.
1600's and before? Starvation was a real possibility for just about anyone. And the average lifespan? Less than 40 years old.
THE PAST S.U.C.K.E.D. There is no other way to put it. Sure, the present has a heck of a lot of problems, but it is orders or magnitude better than the past. The past was pure misery in many cases.
No, I couldn't stand to live in any other society than the present day. And that goes for almost any nation in any time period as well - almost every single country on earth was worse off 100-1000 years ago than today. You think third-world poverty is a recent thing? Third-world nations weren't rolling around in riches before, just so ya know. Nor were they perfectly peaceful either! As much as I detest racism and realize the horrors committed against indigenous people, the White Man didn't ruin EVERYTHING, nor is he the source of all ills. Every single nation was worse off in the past than in the present, with the sole exception of Somalia, which had a working government in the past, but lacks one right now.
You think Russia is bad now? Worse under the Tsar. You think the UK is bad now? Imagine what life would have been like as a feudal serf or peasant under a King/Queen with real power. You think the US is bad now? Just try to imagine how much worse it was when it was busy driving off and killing Native Americans pretty much wholesale. You think things are bad now? At least we didn't have to contend with Polio, or State-Sanctioned Slavery (which happened in Rome, Ancient China, and many other nations, including the Confederate states of America).
The sad, crushing truth is, things have never been better for humanity. Think about how sad that statement really is. With all the problems, genocides, wars, diseases that we have now, it's still better than any other point in our history.
And another thing: Forensic technology. In the past, you could be hanged by the State simply because some rich socialite says you committed a crime, and the police would trust them and take their word over it. In the past, if the police wanted to put you in jail, it was ludicrously easy to do so - because there were no court-appointed lawyers (who did their job properly at any rate), there WAS no DNA evidence or security cameras. You could get away with murder, and you could be accused of murder based on hearsay. Justice in the past SUCKED. Read some of the "trials" and "courts" that existed back 500, 600 years ago - they were a JOKE. As bas as our present day justice system is, we don't put people's hands in fire to test if they stole something!!