In response to Falkenstein’s Parable of a Light Bulb, I would just say that throughout our lives we have quite a bit of influence over how our neural connections are weighted. In other words, we have significant control over not only what we are good at throughout our lives but even more so what we enjoy (or trick ourselves into thinking so, no difference). For most people it takes practice to consciously take control, but that’s a separate matter.
I always wondered how much of the enjoyment from doing something (work, hobbies, etc — lighting up the room in the case of the lightbulb) can be explained by the selfish desire to have an impact on other people’s lives. There comes a certain pleasure from mastering a task or skill, no matter how simple and irrelevant. This certainly contributes to one’s enjoyment of life.