In creative business, sense of obligation to your own family is a downward spiral. It increasingly drives you to do what you would rather not do, and in that process, you begin to hate what you do. Clients would rather work with those who enjoy what they do, so you lose business, and money, which makes you feel even more miserable, and you hate your job even more. And, so on...
As irresponsible as it may sound, even when you have a family to feed, you still have to have fun. Having fun, in creative business, is your obligation.