I do not think it is useless to ask what makes me happy. You know there are such things as forests and trees. You start with differentiating big themes, such as what makes me happy, or what do I want, or what will I be doing in ten years time, or am I really in love, you focus on one of the big themes and then you go into the specifics.
Its harder to start from the bottom up when the matter is so pervasive and complex.