It's no secret that Los Angeles has a deeply routed car culture. I don't really know the specifics, but I know that when I'm out there, I always see the most interesting cars. I attribute this to a few main factors.
LA is a big city. To go from Venice to WeHo is 9 miles driving. And you're in the same city.
On top of that, it's not a very walkable city. Sometimes, sidewalks just end or you'll find yourself in the middle of somewhere you don't want to be.
I can't state this as fact, but I get the impression public transportation is sub par. When I lived in LA, I never took it. At the time, I didn't even know of any stations. Since I've left, one's opened in Santa Monica.
And because traffic can be such an issue LA drivers spend more time in the car than drivers in any other city. I just made that up, but you get my point. As a result, LA drivers spend more on their cars. If you're going to sit on the 405 for 3 hours, you might as well do it in style and comfort.
I also think the dry climate improves the longevity of LA autos.
Here are some photos I took on my recent trip, of cars: