Do what it will make you happy ... over longer periods

Keep in mind this question: How much are you supposed to enjoy what you do? If you underestimate your answer, you'll tend to stop searching too early.

Liking your work does not mean doing what makes you happiest in this second, but what will make you most satisfied over a more extended period, like a week or a month. Your work should be your favorite thing to do. It should be something you admire.