I haven't seen many 6's post, but for me, 6 is spot on. I am a 6 and a Libra. So far, no heart troubles. I'd like to think I've avoided my weakness, but really, that is probably because the 'learning to accept responsibility for others' has not felt like a choice at all, but rather something that has been imposed on me. (And I don't mean for that to sound grumbly. In my younger days, it did make me grumbly, but I learned that if I did take responsibility, things tended to work out better. So even though the universe didn't give me much choice, it did reward me for my efforts.)