Another aspect, however, concerns motivation vs. commitment. When it comes to hobbies I am quite driven by motivation. Unfortunately, motivation often doesn't last long. That's why many people point out that commitment [doing something despite a momentary lack of motivation] > motivation.
And this gets me back to square one as commitment is something I rather associate with corporate culture than leisure time. [Of course, you could make being commited x times a week a goal to get some satisfaction out of it but I doubt that would work for me. It probably also depends on the activity: I can commit myself to regular exercise but I can not force myself to sit down and write some music 3x/week]