"The thing that I have come to appreciate most about founders is a deep obsession about one thing over a long period of time. When we first met Joshua Schachter he had launched three versions of what were sort of social bookmarking, that he had then shut down before he launched Delicious. Dennis Crowley has been working on what has become Four Square since vindigo, which was a flat iron portfolio company that we invested in over 10 years ago. Jack Dorsey you know, came up with the original version of twitter back in the late 90's and he had been obsessed about that idea for almost a decade before he built it inside ODEO. And I can go on and on and on, but that sort of maniacal obsession about a specific issue and a specific domain and a specific kind of service, is the thing that to me is the most compelling trait of an entrepreneur."
http://techcrunch.com/2011/05/23/fred-wilson-be-your-own-bit...