Great question. In fact, I had a neighbor ask me the same question last summer when we were over at his house for a cookout. Sittng around after a few beers, he asks me: so what is your passion (that is how they ask the question in Poland). I thought for a moment and it occured to me that I don't have one. Sad. He wouldn't accept that as an answer and kept pressing me. Finally his wife sensing my discomfort, made him stop. But the question stuck with me. Why don't I have anything that I am passionate about.
I like a wide variety of things and find enjoyment and beauty in even the simplest, smallest things but I've always been a bit of a generalist. I think being a JW also contributed to this in that we were always told to set our own interests aside for kingdom (WT) interests - you will have time for pursuing your interests in the new system. So no hobbies, sports, advanced education for me. Right.
Now I'm out and at 57 trying to find out what I should have discovered many decades ago. Damn. If I was back in the states I would probably go back to school for me and study biology at the micro, unicellular level.