The older you get, your "highs" are never as high as in the past, but your "lows" are also never as low. You'll never be as happy or excited as you were during your first christmas. But you'll never be as disappointed as you were when you didn't get what you wanted. You'll never be as happy or excited as you were on your first or the first few dates. But you'll never be as disappointed as you were when you were first rejected or had your first breakup. Christmas and dates, like life itself, becomes transactional. The great joys and disappointments are gone. At some point society beats you down, you gain experience and life goes on autopilot. You've pretty much seen it all and done it all and there isn't any more "magic" or disappointments.

And I agree that "nothing is really new anymore".

Nihil sub sole novum.