Culture is superimportant, and it's also highly varied. Having a consistent culture in a company creates so much friction. The interesting thing about twitter big, but fin twitt is small enough, so there is a comradery. There is a certain decorum which is missing in other parts of twitter. Some cultures value thisand it don't have to be the samebut fun about startupss,. It's the time when you care least about the money and the most about the mission.