I used to like Linkin Park...I listened to nothing but Hybrid Theory for a while, then got bored as fuck with it. Better than Papa Roach, though, I listened to Infestation ONCE and got bored with it. Linkin Park are just another band that sells records on the basis that they're angsty, and angst sells.
But you can't say I dislike music that's popular, considering I still love Rob Zombie, White Zombie and Powerman 5000, AC/DC is one of my favorite bands, plus a plethora of non-metal mainstream groups that I love.