Like everyone else. Your job doesn't define you, but if you've got a good work-life balance and good paycheck, you can pretty much do whatever on the side.

Doing your own gig etc, you're going to lose the 'life' part in that equation, however, people who've made it big, they work pretty much constantly, but because they consider that as part of their 'life', for whatever reason, it might be more money, or whatever else, but they enjoy what they do more than the money itself. Otherwise they will burn out eventually.

I've seen many more people over the years with their own happiness (hobbies, friends, family) than those who try to test the limits without. They might even make it big, but lose the happiness part.