Oh, one thing that was interesting was how other companions reacted if you proposed an open relationship with them.

Somehow at that point I had romanced both Astarion and Gale (which maybe was a bug, since I don't think that should have been a possible combo and the game seemed to get confused every time the story had to refer to a love interest). After Halsin told that he'd be happy to start a relationship if other partner was okay with that and I went and asked Gale's opinion... well let's just say it was interesting.
He got really angry, disgusted and dumped my Tav, which I felt was realistic, sad, hurtful and well written.