I mean the personalities. I don't think being a "complainer" vs a "feel gooder" personality type changes much based on salary.

Yes and no?

In areas like SFBA where the job market is liquid, people will be less likely to be stuck in a job where offer basics like salary don't match their expectations -- so they'll be more likely to weight other factors like culture and mission when considering how happy they are at their current job. In less fluid markets, people can more easily find themselves in a position where they're disappointed with salary but unable to find a better opportunity.

In those situations, you might be more likely to find people who are either satisfied or dissatisfied with culture, mission, growth etc but are also disappointed with salary.