People change every unit of time. You are not yourself yesterday. Life changes as well. Thinking about life in the past, there were many good things then and there are many better things now too.
In the past, you did not have so many electric devices like nowadays, so you spend more time with nature, with your family, with your friends. The environment back then was more fresh and less polluted.
However, the medical condition was not as good as now, people died from so many simple and easy to treat diseases. Means of communication were limited as well.
If I have the chance to go back, I would just choose to go back for a period of time to enjoy the good things back then. After all, everything grows up and grows better.
