There's also a scene where Quinn kisses you on the cheek, ( if you're in a romance with him) on the Hoth orbital station where you fight Draagh (twice) and Draagh goes over the railing to diaf, supposedly to his death. A lot of people have missed this one, too. It happens before the Quinncident and doesn't change it, but it suggested to me that his affection was genuine. It was cute, too. You can't have any companions out at all to get this particular scene.
Somehow I get the feeling you may be making this up... Why wouldn't you have any companions out with you?