I guess the operative question is "As whom?" For 99% of people over 99% of human history, being alive at all means living day-to-day with a 33-year lifespan, hoping the harvest comes through or that you're able to catch enough food to survive, praying your village isn't sacked by raiders and that your kids survive childhood, and wishing your toothache would go away or that you didn't have a club foot.
It would be interesting to be a Persian monarch during the Achaemenid Dynasty or an Egyptian pharaoh during the Middle Kingdom or a Chinese emperor during the Han Dynasty or something, but that would probably suck, too, as you were just as likely to get poisoned by your mother-in-law or stabbed in the back by a court eunuch than to live to old age. And they had toothaches and club feet, too.