This is very good and very solid advice. I know exactly what you are talking about. In hindsight, it is pretty obvious. At the start of a programming career, it is easy to feel the wonder, because there are so many marvellous and great things out there. I remember how excited I was about Haskell for example, about 15 years ago. But after 10 years or so, you have to start working on projects you really care about and which keep that sense of wonder alive. Finally, you have to work on projects that you dreamt up yourself, and hopefully YOU will become the source of wonder.