To add to this, since the work I do at my job aligns very closely to my hobbies, I find that work saps my interest in putting time into said hobbies. If I were able to spend the entirety of my mental capacity on things I _want_ to do, I might do more. Who is to say. As a counterpoint, work can offer opportunities to work with technologies or concepts you might not think of or be able to afford while working on a personal project.