I'd argue that everybody wants to do something that matters, and the fact that Linux has had a huge impact on the tech market and is used virtually everywhere is obviously very personally satisfying. I think programming is fun, and the community around the kernel is great, but a project has to be relevant too.
Linus TorvaldsThe big thing about distributed source control is that it makes one of the main issues with SCM's go away - the politics around "who can make changes." BitKeeper showed that you can avoid that by just giving everybody their own source repository.
Linus TorvaldsShareware tends to combine the worst of commercial software with the worst of free software.
Linus Torvalds