I do, I run a small video games company, making games that one person can make, like this one: http://store.steampowered.com/app/386900. I've posted about it here once before, but my 'thing' (if I have a thing) is that I do both the programming, but also the art side. Computer Science is my training, so I can do the software development, what is less common is that I also have some skill in painting, design, animation, so unlike many games developers it is actually quite sensible to be a one-man unit. The actual number of copies that I need to sell is very low even compared to the numbers of friends of mine who have a team or two or three. Even <10,000 copies can be successful for me. I do contract with a couple of audio people, who are just better at that side than I am.