I agree, I'm a very compatible person, but there is nobody I know that is similarly skilled and interested in starting up an idea. I have a lot of long-time business contacts (from freelancing) who sometimes have very great ideas and even data to back-up the potential success of it, when they know a competitor for example. They want me to do it all the software-architecture, coding and sometimes even the design, but cannot invest themselves into it, except for connecting us to the potential customers they know. I once had a co-founder who at least did the business part of thing (man he was really good at it), but he stopped when it started to become fruitful, due to severe illness of his mother. Well and we never made things on paper, which concerned me, but not him.
I've one friend who I could do co-found with, but he wants to move to another country and work for an infosec company and won't have any spare time then, nor has the risk-taking ability that's required. Well, because otherwise he'd stay from start to finish of the product and not hunt down his the career-path as fast as possible.