I want to start by saying that this album is absolutely incredible. It's one of the best albums I've heard and probably my favourite hard rock/nu metal album I've ever listened to, certainly recently. Most of the songs on this album are angry and about hatred, deceit and conflict. Breaking the Habit is essentially about suicide, for example take these lyrics from Breaking the Habit, "I don't know how I got this way, I know it's not alright, so I'm breaking the habit, breaking the habit tonight" and "I'll paint it on the walls, cause I'm the one at fault, I'll never fight again, and this is how it ends" so this song could be quite depressing for some people. I'd very, very, very highly recommend this album to anyone 13 and up who can handle a song about suicide and angry music.