I have an automotive idiosyncrasy. OK, I have several, but one is very obvious. The car I use as my "daily driver" has to be silver. Don't ask me how this started because I don't know. I can't even say that silver is my favorite color. Regardless, when it comes time to buy a new car, I go out of my way to make sure that the car I'm most often seen in is silver.
If you think that's weird, consider the case of a very famous automotive designer and collector from Wisconsin. Regardless of the original color of the cars he bought for his personal collection, they were all repainted to his strict criteria. If it was a convertible, the car had to be Packard Cream. If it was a closed car, it had to be Packard Blue. Ironically, he wasn't a huge collector of Packards.
So, now that I've bared my soul and shared another bit of useless automotive trivia, I'd like to know what your favorite car color is.