Great observations Brian,
Now that I'm landlocked (a temporary affliction I assure you!) one of the things that I miss is the livaboard community. We chose a house with close neighbors, but even at that we are close neighbors with only 3 houses around us and seim-close with 2 others. A couple more we recognize and wave to.
On the docks, I knew everybody. It was a big marina peopled my many livaboards and I was friends with many of them. We could borrow things, get a helping hand, receive advice (asked for and not) and on and on.
I remember lamenting that in the apartments I lived in I didn't even know what all of my NEXT DOOR neighbors looked like. The ones I did I never spoke to. Once on the boat it was instantly different.
I guess we all have the "crazy like us" in common.