Business motivations

I was discussing entrepreneurship with a friend. Some of us look at every occupation in terms of business value - others have a portfolio distinction, between things we do for fun, and things we do for financial return. For example, most of the things that I find amusing, either aren't immediately profitable ( such as research ), or are actually costly ( such as annoying other people ), so I tend be the latter sort of businessman ... most of my business interests are for fun, whereas if I want stable income, I hedge my exposure by seeking employment in areas which I have little to no intrinsic interest.