Great climate.

And you live in a climate area that has a cold winter.

It has 2 major and practically permanent advantages: Weather(especially relevant in the climate change era) and location between Berkeley and Stanford, that no other place in the US can successfully overcome.https://www.biggerpockets.com/forums/888/topics/850101-bay-area-housing-2020-crash-or-no-crash

We had another guy (I'm guessing his diagnosis was anti-social personality disorder with the jealous subtype).

As an outsider it does seem insane and untenable, but every time I visit, I am amazed by the climate and culture and can understand why so many people want to live there. 

Credit checks don't show personality disorders.

Is is going to help society (or the disordered individual) to treat that dysfunctional person with bipolar, ptsd, narcissicm, or one of the many other possible personality or mental disorders as a criminal?

I understand that lay people can't 'diagnose' but as a landlord, you can save yourself a lot of grief by being informed about the different types of personality disorders and recognizing the signs-- especially of the cluster B disorders.

For example, the document that Phil provided states what mental disorder is being treated.

Especially in cold weather climates, timing of vacancy can make a tremendous difference.