I believe my mother is mentally ill. She's a happy person, but extremely obsessive compulsive. Her sons are both OCD with bouts of clinical depression. Her father had OCD, and was likely schizophrenic. My cousins are quite eccentric, if not mentally ill. My grandfather apparently possesed mental illness so genetically dominant that it still lives two generations later. Do you think my children will inherit my disorders? Does anyone here have a family with such dominant mental illness?