Congestive heart failure runs on my dad's side of the family, while I'm not sure what runs on my mom's side. Most likely bipolar and my mom suspects that Marfan's may also come from her side and is convinced that my half-brother and I have it. We both have odd musculo-skeletal issues, such as long limbs, short torsos, loose ligaments, and crooked spines, and an elongation of the face.
As for my dad's mental issues, I haven't a clue. He's just an ass. I haven't pinned down any diagnostic criteria, though he does display many of the hallmarks of antisocial personality disorder.