> In fact I am quite fierce and get huge amounts of good work done, when I believe that what I am doing is important. It turns out that, for me, to capture this feeling of importance, I had to work on my own projects (and even then it took a long time to find the ideas that really moved me).

This is dead on. Very much reminded me of a slightly sensationalized article I read a number of years ago:

http://cyberstentialism.blogspot.com/2012/08/ten-percent-of-...