I would like to see the companions have actual preferences. Like, for the red prince, and his view that lizards are superior to all other races, would only make sense with another lizard, or Fane only being interested in another undead, because he views the living as savages. I would also like it so that some companions are simply not interested in romance, or maybe one of them just wants to sleep around?
Considering that, if I remembwr correctly, the love/hate stretch goal was tied to beefing up their character "tags" system, I would imagine that character preferences are part of it. In fact I *think* I remember Swen saying something along those lines