Secondly, work will always be work, regardless of how much you love doing it. The key distinction between work and fun is in the concession of choice—you can’t just choose not to work when you don’t feel like it—you have to do it no matter what. So when you take something you love and make it your work, it stops being the charming whim you so freely pursue. And if you no longer have the freedom to choose when and where you do the things that you love, then where’s the fun in that?