ok so im gonna steal one from them:
you know you drive a bmw when everyone in town knows you by your car.
In my case, its a university and the town, and yes, that is very very true. Ive talked to so many people, and when it comes to talking about what i/they drive, I tell them the black bimmer,and they're like: 'OOOh thats you!!' lol.. yup thats me