Family vacations are great; you get to see people you haven't seen in a bit, all while relaxing and having fun. The only hard parts come when people are talking. Maybe I don't get out enough (odds on this approach 1 ;), but some people in my family use language to hurt others (maybe inadvertently in some cases), and it's really annoying. I figure I'll end up being a language cop, "You didn't really mean X, now did you? ~X is a lot closer to the truth.", or maybe the confrontational, "Do you realize that you're throwing verbal knives at your own relatives?"
The good thing is that this inanity hasn't been passed on to the youth in my family, yet.