God question.
Modern, at least being middle class or up. A lot of draw backs in this era, but some awesome things like endless entertainment, and information at our finger tips.
It's a decent age in medicine, most things are treatable, and we've even been able to give things like hearing and sight back to people, not to forget things like high end prosthesis that imitate real nerve sensation in the appendage, and so much more.
If I could jump ahead, if there is still civilizations to about 50-100 years I think would also be an amazing time to live, as long as the threat of global warming is taken seriously as it should be, being the greatest threat to almost all life on the planet.
I think Romanticism would be my 2nd, it was a great time to be alive as well if you were lucky enough at birth to be born into a decent family, and stature. Same could be said about Renaissance, great eras of information and discovery if you were in the right places.