On one of my characters, I have all of my companions (I haven't unlocked all of them yet) settled in Sanctuary Hills. Everyone seems to have a favorite location to hang out at (Hancock, Danse, and Piper like to work in the garden). My two robot companions, Codsworth and Curie, however, have been exhibiting interesting behavior, in my opinion. They are always going to this one house in Sanctuary, located on the cul-de-sac. And when I ring the bell to gather my settlers, those two always float side-by-side. Honestly, I think it's cute, though it's funny that they both seem to have chosen the same house to chill out in when nothing is going on.
As a conversation starter, have any of your settlers or companions picked specific habits, locations to hang out in, or other companions to be near?