My photography is split between business and personal. About 60/40, and the business side is mostly for my use, such as selling something or advertising a service, that one would have to pay others to produce a picture. However, I have occasionally done work for others, mostly other businesses, and did it more for the challenge and enjoyment than the money.
However, it is not how I make my living, nor would I want to make a living at it. I think my contribution to the economy is much greater that way.
In any case, I have been fascinated with photography, both picture taking and processing most of my life.