Both! But I could really have fun with the idea. I could turn it into a satire of sterotypes etc.
Right now I am thinking of a system that combines the sanity rules from Unearthed Arcana with some of the mechanics from poisons and disease. Had to much contact with the positive energy plane...
I suffer form bi-bipolar and I certainly wouldn't describe myself as chaotic. I had emotional swings, not personality swings.
And mental illness also doesn't always take away the ability of a person to make choices of the sort that would effect alignment so IMO that idea is flawed.
I agree.