We have topics over topics discussing AA kissing animation or Shadowheart liking Halsin, but very little discussions about the personality or character of them or others.
Personally, I don't think the problem lies in romancable comanions themselves, or that romancable companions can't be interesting. It is just that if every RPG game makes every companion romancable, that greatly limits a potential range of your companions. While I understand that characters like Wynne or Stren don't generate as much "engagement" as shaggable cast of Dragon Age, I do think they are an important part of the puzzle.