That's an interesting hypothesis. I'm curious to see results. In my case, I run counter to your proposed outcome.
1. I work on my cars and my family's cars up to a point. (This has saved my family much in labor costs over the years.)
2. I am a casual fan of road racing - both US and European variations.
Brand loyalty: None - My daily driver is a 16 year old Yukon. I have no complaints; none. But I would not buy a new Yukon or Suburban. They have evolved past my needs (as have many vehicles in the SUV segment). The Subaru Outback seems to be closer to satisfying how I use a vehicle more so than the new breed of SUV's.
I like cars in general, old ones, new ones, from sporty to distinctive lines and clever technical innovations, and their country of origin doesn't matter. I do have my biases, but I don't take part in brand bashing (well, I do at car shows and at the track, but it's just good natured fun - and seriously, when a '74 Vega posts a better track time than a 2014 Carrera with a snobby, braggadocios driver, you have to say something).
Ohhhh, I would
I'd never own a rice burner. And as for motorcycles, my Harley eats crotch rockets for breakfast!