"There's a huge, gratifying feeling on the rare occasions that any of us come up with an inspiration to do something innovative. The personal rewards, and just the feeling, is enormously good. Part of what gave us the ability to be creative is the old thing - -necessity is the mother of invention -- and the passion and curiosity about why things work. It's about the ability to picture what's going on and discuss things with other people who have thought about it longer than you have, or have a different approach... It's a fun thing to do, for sure. You appreciate other people doing things when you read the history books. If you feel that in some small way you can join this illustrious bunch of people who have done things, it's worth having a go at it."