I like various music from the past 100 years or so, not just from when I was young, and agree quality of current pop is pretty low compared to that time period.
I'd give way to say that the music from your teens and before. It's much easier to appreciate music from before your time than after your time for some reason. I'd guess nostalgia in part and because when you first heard the old music it was new to you and part of your nostalgia. So you don't experience it the same way that teenagers did when it was released but you have a relationship with it that is meaningful none the less.
