Ikigai
I ran across a post detailing the translation of the Japanese word 'Ikigai' -- loosely translating to "Reason for Being." I've noticed that some languages can capture a concept much more simply and meaningfully than English. Conversely English continues to invade other languages with our slang and technology.
There is a good article in the Toronto Star that details the concept. Looking at the various sectors of the chart aided me greatly in my introspection. Maybe it can help you too:
For me, I can clearly put mountain biking and skiing in the passion buckets. There are plenty of places I can put some of the Software/Firmware and Mechanical projects I work on. I think embedded electronics and control systems are the closest activities to Ikigai for me. It is interesting to me to think about activities and where they might fall so that I can help adjust the trajectory of my activities and where I spend time - maybe it will be helpful for you too.