Well, let's see - because I wanted to have children, and I didn't know who my biological father was, so I wanted to understand if my wife and I were likely to c

Well, let's see - because I wanted to have children, and I didn't know who my biological father was, so I wanted to understand if my wife and I were likely to carry any of the same dangerous recessive genes? And I wanted to know if there were likely any big, detectable gotchas coming up as I got older. And because, in the process, I discovered a couple of half brothers. My life is better because of the knowledge I got from genetic testing. (It also wasn't a "random" startup to me; I had it recommended by someone I trust who knows the founder.)