Good music is good music, age aside, but I particularly enjoy good music that I can tether to some specific point and time in my life. It just resonates more with the emotional side of music for me. Like reading a book as soon as it's published, and the author signed your copy as you talked about how you interpret it. So I always seek out new music, in addition to enjoying older music that thus far has been the soundtrack of my life.
My wife loves "oldies" (song's her parents grew up listening to)... I don't really connect as much with those songs. I absolutely can appreciate the emotional nostalgia of that music to her, but to me, I don't connect as much intellectually with songs/artists that came and went before my early teenage years.
I don't judge people's musical tastes in reference to their age, but I do enjoy music more in reference to my age.