It's been fun - and informative - reading this thread.
When my girls were in high school, I made lots of prom dresses for them, and for some of their close friends. I can't recall how much I was paid, but it was more fun to see their faces light up when they donned their dresses. (I got to keep the leftover fabric. (Can you say 'Crazy Quilt?)
I do some mending for family only, and like many of the grammas here, I can't say 'no' to a request from a grandchild. Oh, I also do favors for favorite nieces, but they return small favors at some time.
My favorite non-quilting sewing is that of creating christening gowns...my grandniece looked beautiful in hers in April. I did it as a gift...her mom looked for one for her, but they were quite expensive, so I offered to make one.