What's the worst mental illness to have?

I think it's definitely schizophrenia.

Hearing voices, being paranoid, thinking that people have powers like mind reading over you, are just awful.

My great grandmother had it and it was awful.
Whats the worst mental illness to have?
Schizophrenia
Depression
Bipolar disorder
Dementia
ADHD
PTSD
Other
Select gender and age to cast your vote:
What's the worst mental illness to have?
Post Opinion