There's a thin line between interesting music and self-indulgence. We crossed it on the Passengers record.

We all have views on what our Irishness means to us. Two members of the band were born in England and were raised in the Protestant faith. Bono's mother was Protestant and his father was Catholic. I was brought up Catholic. U2 are a living example of the kind of unity of faith and tradition that is possible in Northern Ireland.

I think I look cool. I don't know about the other three but I look cool, I am cool.

Relevance, for me, is about being creative and doing things that you believe in, whether that's music or acting or painting a picture, or whatever that is.

The only thing I wouldn't like to do is to play roles as a musician. I'm not sure that I would be comfortable doing that, and I'm not sure I'd be very good at it. I think I would be better served, and would be a better partner, if I was in something outside of myself.

If Bono left, we could carry on. If I left, we'd be screwed.

The longer you've been acting, normally, the better you are at it. As a musician, it doesn't work like that.