When you let customers tell you what they’re after, they will often reveal amazing details about what they find valuable as well what they’re willing to pay for. The surprise is generally positive as well as negative. They won’t like what you’ve built, but there will be other things they would like that would be trivially easy to implement. It’s not till you start the conversation by launching the wrong thing that they can express (or perhaps even realize) what they’re looking for.
— What Startups Are Really Like, Paul Graham
