When I was diagnosed, I was asked to catalog the mental illness in my family (basically, parents, grandparents, uncles, aunts and cousins). I remember sitting down with my parents to collect this information. I was surprised to learn how “broad” it was. It included bipolar, hysteria, hyperactivity, depression (including suicide), anxiety, depression, OCD, addiction and general social ineptitude. One person had a nervous breakdown and was close to being institutionalized.
It seems like a lot. Then again, sometimes I wonder how abnormal it really is. In order words, maybe it is normal (to have so many conditions within the family).