Green Day - American Idiot (when I was 12 or 13)
Sad, but I admit I was a victim of MTV. It was a little catchy, and this was the first emotional music I have ever heard, and my brother also wanted it too.
My first real album I bought was 'The Clash', and that (coupled with my incoming hormones) pushed me down the punk path for a long time until I found the Beatles.