Running a startup has been one of the two most amazing experiences in my life (the other being raising a kid). It's an everyday problem-solving challenge. It's an everyday brainstorm. It requires you to reinvent yourself every other week, to try and outsmart the smartest people, who also happen to have more experience and more money. Holidays and weekends are but an illusion when the fate of 25 co-workers and hundreds of thousands of users rests on the decisions you have to 'sleep on.'