The best first time entrepreneurs have been stewing on their idea for quite a while. It is a personal passion of theirs and they bring to it a fresh take, a stubborn insistence on their approach, and they obsess about the idea 24/7. They often get the right product into the market at the right time and they capture the user's attention and usage with that product/market fit. Serial entrepreneurs, on the other hand, often struggle with the founding idea and getting to product/market fit. They start the second and third and fourth company because they love startups and they don't know any other way to work and be productive. But they often lack that passion around a singular idea that drives first time founders.