The strongest predictor of who does extraordinary work is whether they ever obsessed over something pointless. We've seen this across 5000 startup meetings, but the pattern showed up across everyone from scientists to athletes. We’ve met people who spent two years optimising their fantasy football algorithms, or memorised every player in the NBA at 11, or collected thousands of train tickets, or built a Lego replica of their school; none of these activities really had much point. What they were demonstrating was the hardest skill in any field; the mental capacity to stay focused on a boring task for much longer than it deserves. The path to genius is mostly boring repetition, and people who achieve it have a broken off-switch. It is tough to fake having spent years obsessed with boring things that didn't matter.