I gave anything related to what I was actually working on 5 stars.
I gave everything else 1 star.
This has always been pretty binary for me.
When I have loved working on what I was working on, nothing else could have screwed that up. I just kept plowing on, motivated almost solely by compulsion.
When I have not loved what I was working on, nothing else could have helped except working on something else that I loved working on.