I look for founders who are scrappy and formidable at the same time (a rarer combination than it sounds); mission-oriented, obsessed with their companies, relentless, and determined; extremely smart (necessary but certainly not sufficient); decisive, fast-moving, and willful; courageous, high-conviction, and willing to be misunderstood; strong communicators and infectious evangelists; and capable of becoming tough and ambitious.
Some of these characteristics seem to be easier to change than others; for example, I have noticed that people can become much tougher and more ambitious rapidly, but people tend to be either slow movers or fast movers and that seems harder to change. Being a fast mover is a big thing; a somewhat trivial example is that I have almost never made money investing in founders who do not respond quickly to important emails.
Also, it sounds obvious, but the successful founders I’ve funded believe they are eventually certain to be successful.
Here is the full blog post — agree or disagree?