Metallica frontman James Hetfield spoke in an interview by WRIF and explained why he hasn’t done any side projects outside Metallica throughout the years. He said:

Metallica’s pretty much my side project. I get to do whatever I want in Metallica. [Laughs]

“There’s not really a need for it. I write things that make me feel good, and if they end up in Metallica, then that’s even better.

Sometimes they don’t. Sometimes they’re like a ‘Nothing Else Matters kind of thing, and they’re trying to be hidden: ‘Don’t listen to that.’

But, no, there’s really no need for that. Or time – there’s no time for that either. [Laughs]”

Click here to entire interview.