My shot: Once I had a family with wonderful little kids I understood what 'quality time' really is. As much I enjoyed being with my friends or even ex-girl-friends: If I think back of what we did together (getting wasted, so-so vacations, mediocre dinner parties, boring talks at coffee shops) it's so much better now.

It's funny: I am very often invited to dinner parties (private and business ones). Every single time, I just don't want to go. Not because I am anti-social, not at all, it's just that I enjoy time with my family so much more—they are my friends.