The first really great company I worked at was explicit about being family-oriented; they'd bring everyone's family to the office and cook dinners, had Christmas at the founders house, that sort of thing.
I left that company and joined a different sort of family, which was more of a bar-fighting sort of family but still had that vibe.
Then I started my first company, which cratered, and which did not have that family feel at all, despite it being largely a group of people who were friends in real life.
I felt like we got part of the way there with Matasano (at least in the Chicago office, which was our largest), but not all of the way. It's tricky to pull off!
I really only want to work at companies that have that feel, for the rest of my career. It makes a huge difference. Also: if Jessica Livingston can generate that kind of culture on demand, that's definitely a reason to be impressed by her!