Many people think of me as just a riff guitarist, but I think of myself in broader terms. As a musician I think my greatest achievement has been to create unexpected melodies and harmonies within a rock and roll framework. And as a producer I would like to be remembered as someone who was able to sustain a band of unquestionable individual talent, and push it to the forefront during its working career. I think I really captured the best of our output, growth, change and maturity on tape - the multifaceted gem that is Led Zeppelin.

There's always music that moves me. It doesn't necessarily mean that it's within the parenthesis of rock or blues, or whatever. It's usually far more reaching than that. It can be in many different genres.

Once I get onstage the tension explodes and I'm fine. I'm in another world - in a trance almost, doing what I love best, expressing myself through guitar.

I deal in emotions. It's the harmonic side that's important. That's the side I expected to be much further along on than I am now. That just means to say that I've got to keep at it.

A lot of people can't be on their own. They get frightened. Isolation doesn't bother me at all. It gives me a sense of security.

I know what I want to get down and I haven't got much time to do it in.

There's too many good musicians around for the music around for the business to be sagging.