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To follow the crowd and do what is popular these days.
Back when I was in middle school, many people used to listen to shit like Marilyn Manson, Korn, and Limp Bizkit. Then in high school, bands like Slipknot and Linkin Park were already becoming popular. Nowadays with the decline of nu-metal, more and more people are running with the world and listening to bands like Killswitch Engage and Shadows Fall.

And of course the hip-hop trend, which was alway present throughout the 90s, has never died out yet.
by Mark H October 30, 2004