I met Gemma, my wife, when she was 12. She had a schoolgirl crush on me and her dad had arranged for her to meet me. Later, she started coming to my concerts, but I only got to know her well after her mother died. I rang to see how she was, and that's how it started.

I'm very into science-fantasy, that kind of swordfights and magic and technology thing.

I always say it took me 10 minutes to write 'Cars,' but if I am honest it could have been even less than that - and it has been a really successful song over the years. It is still massively used, in advertising, in films, and people do cover versions of it a lot.

I have a condition called Aspergers Syndrome, which is like a mild form of autism It means I don't interact properly in certain social situations.

I just didn't make music that you could sing with a big grin, still don't.

Album sales have collapsed, with few artists making money from albums; touring is more lucrative. But I'm 53 now and won't be able to tour forever, so a logical step is to get into writing film scores. Trouble is, you need to be somewhere which has a big film industry - another reason why I'm thinking about living in California.

I was a loner as a child and happiest at home, launching toy rockets and aeroplanes. When I started causing trouble in my third year at grammar school, Mum was really surprised. My parents sent me to a child psychologist, who suggested I might have Asperger's syndrome.