Some of my family has paid me to do work. Others in my family ridiculed me for charging them, although the ones paying had no problem. I gave them a really good price, maybe 30% of what it was worth.
I have an aunt who wants to pay me so that I can grow the business. She would never think of trying to get the work for free, in fact she is always thinking of new ways that I can do work for her.
I have an uncle who would probably want me to do the work for free, but he has many resources to offer me that I would gladly do him a favor for.
None of my friends are in a position to need an electrician very often. One friend paid me normal money to upgrade her kitchen. Another friend paid me a little to fix a problem that his landlord didn't have time to fix. I think he got the money back later. Another friend has a hot-tub at the house he rents that needs a new GFI. I'll make him buy the parts and I'll do the work for free because I'll be drinking his beer and sitting in the tub with him and his female roommates by the end of the night.