There is a tremendous disparity between the passion and effort that goes into a work of art and the amount a person is likely to pay for it. Some areas pay better than others, and your passion may very well not create much in the way of salable value for anyone else.~ David Cain from, http://www.raptitude.com/2009/12/what-passion-will-buy-you/
This is such a critical point! Even if my passion, “comes through,” in what I create, that doesn’t necessarily mean others will value my work.
Worse, there’s always some amount of capriciousness to the valuation made by others. Even if I’m making something clearly of value, if that isn’t aligned with other people’s values, I’m still screwed. Passion is critical, but has little to do with success.