For me, it's more like age 12, when I first started listening to the radio a lot. That was 1976. I still have a nostalgic fondness for the pop hits of that year like no other. Most of my favorites today are things I'd never heard by age 14. That includes 70's punk, which I didn't hear when it was new. I was well into my 20's by the time I heard the Ramones, etc.