On long rides I have found people with big pickups and horse trailers tend to give me lots of safe space. I don't know any horse people, but my guess is that they understand being a vulnerable road user.

SUVs, and pickups in general, where I live in the 'burbs, are unnecessary and a sign of wasteful consumption. Their drivers tend to be selfish jerks. I imagine that drivers who actually have a need for large vehicles may drive differently, like the horse trailer people.