Figuring Out What You Should Be Doing
Basically, whatever you do should have 3 ingredients:
2. The ability to be very good at it (ie able to put 10,000 hours into it)
3. Drives your happiness engine.
If you have passion, but you can't ever get good, you'll lose your passion. If you're passionate and are good, but what you're doing is part of your happiness engine than you won't feel fulfilled.