I started listening to classical music when I was around 18. It now comprises about 1/3 of my music library which is about 2K + CD's. I tend towards chamber music and more obscure composers, but still focus on music composed from 1600 to 1830. If I had to choose what to listen to for the rest of my life, I would choose classical without hesitation. It's more complex than Rock & Roll, Blues etc...(some jazz has it's moments) but you can listen to classical in the forefront or background and hear different structural elements. It's not boring, once you listen to it. How many times can you listen to some iconic Rock music? It runs its course pretty quickly and you grow audibly tired of it. I don't experience that with classical.