My startup investment thesis has been 70% about who are the founders (are they smart, successful, confident, charismatic, humble, fun, ethical, driven), 20% about what problem they are working on (is it massive, am I interested in it) and 10% on what they are building.
I've invested in about 60 software startups -- about 50 of these have failed, but the ones who succeeded did so in a big way:
My top startup exits:
My top startup active investments: