Quote Originally Posted by Mr Beer View Post
Yeah, this is all campaign dependant. My guess is that a D&D game where everyone has a mental illness isn't intended to be an accurate portrayal of what it looks like when a bunch of people with mental illnesses get together in one place and interact.

From my brief experiences of visiting my father in various institutions, I think that would be a tragically sad and unhappy game. He suffered from bipolar disorder, now if someone was going to play a 'bipolar' character in an RPG, that might typically be depicted as someone who is inappropriately bouncy one minute and much like Eeyore the next.
This isn't the only accurate portrayal though - severity varies highly, and anyone who's been in and out of multiple institutions has pretty severe mental illness. A bunch of people with mental illness getting together in one place an interacting can also look just like a bunch of people without mental illness socializing.