Present is cool, but I'd kinda like to visit the 80s and 90s. Go back to the 80s and pick up a Korg Trident and come back satisfied.
I've been there, it's rubbish.
Anyone thinking about how nice it would be to live in a certain era needs to be careful what they wish for. All those mansions and castles and country estates and balls (the dance kind) were the preserve of the rich. If you were prepared to take your chances on who you would be, chances are you would be one of the overworked underfed majority, prone to all sorts of diseases and deficiencies that are now either very uncommon in the civilised world or have been banished to the history books.
The very end of the 19th century and the early 20th, up to 1913, would have been a fascinating time in many ways. The world was largely at peace, world-changing scientific discoveries were being made, the automobile was just coming on the market, opening up new possibilities for travel and recreation - who then could have foreseen that cities would one day be dominated by the car, to the point in many cases of being choked? But remember, many countries suffered a disastrous economic downturn at about this time, worse than the one just passed - and there were also a couple of nasty epidemics that killed a lot of people, especially infants. It was also a very conventional time, not so good if you were not one of those people who did not fit the social mould - gay for example. The book "The Well of Loneliness", by Radclyffe Hall, gives a good insight as to what life was like in those times for what might be called "social misfits".
It's all hypothetical anyhow; I am going to live in the future, whether I want to or not. (Unless I die right now, not an alternative that appeals to me.)