I dunno really.
To me it doesn't seem right to play certain music in the church. Why are you playing/listening to it? To glorify your creator or for your own pleasure?
There's a line when it comes to this. 'Christian rock bands' don't seem much different than any other secular bands? When asked why they play the music and act the way they do, "It's because we want to reach out to an audience that normally wouldn't listen to christian beliefs."
But, as Christians we're supposed to set ourselves apart from the world and the way that the world acts. We're supposed to be good examples of Christ. So, when non christians look at the way a lot of these christian metal bands act and the music they play....what sets these people apart from us(secular audience). The music is the same(although usually not as good

) and from their first impression...they don't seem like christians. The people that play christian rock aren't bad people....I think it's good that they're "trying" to win people to christ through music...but it almost seems like they're doing it the wrong way. It's hard to get any spiritual uplifting when you can't interpret the screamed lyrics. In most cases the message is lost with the beat and the atmosphere.