Life is about growing
We only have one life. And it is up to us to decide best how to use it. Personally, I believe that every moment can be used to grow and learn.
From work to games, every moment is a learning opportunity, whether it be new techniques to create a fantastic landscape on a table, to finding new and interesting vulnerabilities in systems, one learns new ways of doing things that not only help in that subject area, but can also inspire new ideas and techniques in another field altogether.
Additionally, its important to keep things fun. For if we don't want to learn and grow, then we are just staying stagnant, and letting life pass us by.