Nostalgia, the bittersweet feeling.

A lot of people I have talked with says that nostalgia is an amazing feeling, that it feels good but to me it always feels bittersweet, I love looking back at happy memories and the feeling nostalgia really is powerful but it's also a sad feeling and it just doesn't feel as good as I did at that moment... Even playing a old video game from my childhood doesn't feel as good as playing it when it just came out.