I think in some way what you are passionate about shows who you are because it brings out the best in you. I have to listen to that ted talk :)
Up until now I haven't figured out what I want to do. I'm not good in self-analyzing. I do know that what I want is to provide for the family. I am a person, I think, who accepts things as they are (or I just have gave up fighting for what I really want).