For me culture fit is working culture fit. I’m always looking for someone who can get on board with the way we work as a team. I don’t care if we can become friends or not, if you are willing to work long hours or not (I’d rather not) as long as we can work efficiently together and rely on each other to get the job done.

In early stages, for instance, I would look for people who have a shipping fast mentality. In later stage for people who value technical excellence.

Everything else is at best childish and naive, and too often discriminating against certain persons who would actually be a valuable asset. A grown up can work efficiently in a team without going to Thursday beers every week.