It's a nu-metal album that was released at the height of nu-metal's oversaturation. There was no cursing on the album, so big-box stores like Wal-Mart could sell it to children and the parents controlling their spending habits. The lyrics are so vague that any kind of suburban angst can be projected onto them. I'm familiar with why Hybrid Theory got as popular as it did. It's just that none of those reasons have any bearing on the quality of it. Pop audiences are easy to please. Just look at the success of Flo Rida and Train.