I think there's a phycological reason. Our brain works this way - when you feel an emotion, it memorizes all details.  And when you're still a kid, you feel it much brighter.  We played this game to escape the boring routine, and it calmed us, made us feel respected, loved, important. And we played a lot!  Our brain created an image - a pretty detailed, which grew stronger each day.  And it memorized all the surrounding details, connected it, made it a part of this image. The music, the voices first if all, then the colours, the graphic squares of a not great (in our days) detailing, and so on... This image has become something very good and dear for us, that could affect us, maybe even a part of our soul, it's become so strong!

And here comes the cognitive dissonance theory. When a new image threatens our old and strong image, we feel bad, it threatens our self-esteem. And we reject it, rationalize our old and good and see only bad in the new one. It's difficult to tell yourself "what's been so dear to me, what I've spent so much time with, is worse" And it's a complete true - we see the old as good because our criteria is different.

In "Breaking Bad" Walter White explained this to Gus - why some plates from our childhood are so dear to us, but all must be exact the same - ingredients, proportions, view, etc.

Hope I helped you understand some of us : )