I've always felt that the validity of some diagnoses was questionable (speaking for myself only). There's so much overlap among depression, anxiety, PTSD, and ADD. There were a few possible brain traumas as well. I'll probably never know what's what in my brain. I know it has a default setting of sad/anxious/poor memory and concentration. I've wasted a lot of time feeling bad about feeling bad, and comparing myself to others' "normal" lives. I'm trying to break with my learned negative habits of thinking and reacting, regardless of diagnosis, and adopt a more problem-solving approach. It ain't easy! I'm hoping for that "plasticity" of the brain I keep hearing about.