Comment by shaftway

There's a good read that was put out by OK Cupid (the dating site) 15 years ago outlining exactly this. They had a lot of personality questions that they'd use to match people, so they had a lot of this data correlated with a lot of demographics.

One of the interesting takeaways was about dating compatibility (they are a dating site after all). They found that republicans tended to pair well with other republicans, more than any other group paired with itself, and far better than democrats paired with other democrats.

https://theblog.okcupid.com/the-democrats-are-doomed-or-how-...