Back in the 70's, I had an aunt, that paid big money to have our family history traced. Don't know what became of the information they gathered. She didn't have children, and all of her "stuff" got rifled through pretty good. That was years ago, but I remember well her talking about family members being in the civil war, and revolutionary war. I remember thinking even as a kid, unless your family came after either war, you've probably got ancestors that served.
I've had times in my adult life, where I thought about getting interested in geneology. I usually come to the realization, that if you just go back 2 generations you've got 16 great great grandparents. How watered down is that gene pool? I'm not taking anything away, from people that are big on family history, it just doesn't intrest me.