The music business, or what`s left of it, is obviously a very - it`s like a wild west now.

I would say [Lamar] Kendrick, it`s always fun to see what happens when Kendrick takes the stage. And my two oldest kids are huge fans of him.

Stretching your parameters is a necessity if you wan to keep growing, and sometimes the best way to do that is to dive into the deep end.

If there was no Black Sabbath, I could still possibly be a morning newspaper delivery boy. No fun.

Parenting changes your life, it changes how you hear yourself in relationship to others - which is part of the reason that a bunch of people in the rock community are sick of the goodwill and positive energy and love between these 45-year-old musicians who they preferred when they were 25 and taking stabs at each other.

I would say that I'm very proud that Metallica plays heavy music - but equally proud that we don't think like a heavy-metal band.

Metallica lives in a little bubble. We just do our own thing. We're not part of any trends or waves or fads. We can just do our own thing, all the time. It's a great luxury. I don't think we were really appreciative of it until recently, and really understood that it is what keeps us alive. It's great to be able to have the freedom to run around and do all this crazy stuff, and at all cost, avoid making another record, just to piss our managers off.