alt Hacker NewsWhich is kind of what I was arguing. Understand that having "fun" is not necessarily equivalent to being "productive". And even by an individuals own standards, the two can be completely different.
If you are having fun, and it's a hobby: who cares? If it's in the professional setting, make sure what you are doing is not actually wasting time and/or money, i.e. be productive.
If my measured productivity decreases but my ability to find joy in what I do increases, it's probably worth it. Not to mention the second-order productivity boost that comes along with enjoying one's work.