You're not the only one. I started listening to music when I was 11, and listened to all kinds of horrible music, like Eminem, Usher, Destiny's Child and shit like that. I used to watch VIVA+ the whole day until it was removed by my cable network. After the rap phase I listened to stuff like Green Day, Linkin Park, Evanescence, The Rasmus etc. I started listening to metal and rock when I was 14 years old. But... I still occasionally listen to Linkin Park (except that awful last album) and Green Day (underrated because of their overratedness ).