Well lets see...I've been through a lot of different musical tastes-and I'm only 15.
When I was very little I didn't care what I listened to. Just whatever was playing. I didn't like or dislike much of anything.
Then I got on this huge rap/hip-hop obsession and that's all I would listen to. Anything else was awful to me. I now know that rap is the most hideous thing on the face of the Earth.
That kind of faded away after a while and I went back to not caring much.
Then suddenly out of nowhere I started getting into rock. For about a year all I listened to was Meteora by Linkin Park.
From there it sort of evolved. I went from Linkin Park to Korn to My Chemical Romance to Avenged Sevenfold to Slipknot in about a year. I hung onto Slipknot for a while, but I wasn't satisfied. I wanted heavier. So I dove into Death Metal. I bought Close To A World Below by Immolation. It was a huge leap from Slipknot to that, but I wanted the heaviest, so that's what I got.
Then I started to expand my radar beyond Immolation to include a wide variety of Death Metal. For a while I was into Technical Death Metal. At this point I had completely stopped listening to anything but Death Metal, and I despised most of the things I had previously liked.
But I got bored of that, so I started listening to Classical, Avant Garde, and various other genres as well as Death Metal.
I am now getting into "Post-Metal" (Isis, Rosetta, Made Out Of Babies). I still listen to a lot of Death Metal, but not nearly as much as I used to, and the rest of my listening is split between Classical, Avant Garde, and for some strange reason-70's music (Jethro Tull, Queen, ELO, Stevie Wonder, etc.).
Thar you go. Sorry I wrote so much.