I own a 2003 Dodge Neon, which doesn't get much use since I commute most of the time on the train. It's cute, but not anywhere near as classy or expensive as the car on the left,owned by Exotic Car Share, in which I was fortunate enough to ride in the 2007 Arlington Heights Frontier Days Parade.
Cars have a way of reflecting their owners. Not many rich people drive around in beaters, at least not that I know of, unless they're trying to go incognito.
You can use cars to describe your characters when you write. I used cars as symbolism in my mystery, Two Wrongs. One of the cars was an Infiniti, which Cathy, the love interest for the protagonist, Danny, drove. I won't tell you what happened to her. You can get a hint by the model of the car, or better yet, read the book to find out for sure.
What about you? What do certain cars say about their owners? What kind of car do your drive, or would you like to drive, if you could? Or, if you're a writer, have you ever used cars to help describe characters?