I'm fine with the present. Go back into the past and you get the cold war. Go further back, and you get the world wars. Further back still and you start running out of amenities like running water and the like, as well as no healthcare. Further back you go and you start running into religious fanatics who want to cut your head off, and I happen to be an atheist.
Humans progress, not regress. There is little in the past I want to experience first hand, frankly.
On the other hand, go into the future and we'll no doubt encounter the giant mutant cockroaches and dragons which genetic engineering gone mad will have created. So nah, I'm fine with this era where the cockroaches and budgies are normal sized.