1) Commit to the new company everything they have - even if that means moving their families, quitting their jobs, or even dropping out of their schools (as much as I don't want to condone or encourage this!).
2) Put themselves "out there" publicly and visibly with the industry, their relationships, family and friends. If the company is a failure, it will not be a quiet one.
3) Have not yet achieved a mega-success already and/or yet achieved wealth beyond the point of needing to work again. (I remember my mentor and boss at Open Market, CEO Gary Eichhorn, congratulating me when I became a first-time homeowner in the mid-1990s and observed: "I hope you got a large mortgage so that you are locked in and highly motivated to create wealth!").
4) Participate in a minimal set of outside interests and hobbies that aren't directly related to their business. Starting a company is a consuming, obsessive, 7x24 endeavor. Raising a family and remaining healthy is enough of a battle. When we see entrepreneurs with long lists of hobbies and outside interests, it's a red flag. One of my partners went so far as to look up the number of times an entrepreneur played golf one summer (which apparently is public information somehow, although I'm not a golfer so still don't know how he figured this out) as a barometer for how hard they were applying themselves to their new venture.
5) There exists a rare breed of entrepreneurs that have already had mega-success are so special and driven that they remain obviously hungry and scrappy. For these entrepreneurs, the key is to watch and see if they're still as hands on as they ever were (e.g., obsessed with the product, knee-deep in the financial model, out in front of the organization in selling). Again, these entrepreneurs are very special.
So what are you - the chicken or the pig? Investors clearly prefer one model over the other, not just in the founder, but in the entire team. As a result, as you are assembling your start-up team, be careful not to hire chickens. In the eyes of prospective investors, you may find it's even less kosher than hiring pigs.
Jeffrey Bussgang is general partner at venture capital firm Flybridge Capital Partners. You can follow him on Twitter @bussgang