When we remember older times as better, sometimes it's because we subconsciously filter out the negative things that occurred then. It is a very human trait to think that we can go back to better / older times. If you think about it though, it rarely works out that way.
"You can't go home again." - Thomas Wolfe
"It's the laughter we will remember whenever we remember the way we were." - Marvin Hamlisch, Alan & Marilyn Bergman