Usually its the commodores round here that stick out. Its when you realise that the FJ cruiser sitting next to you at the lights is unmarked not to mention a Rallisport Lancer, a HSV commodore ute, a pimped out Chrysler 300c running on 20in mags, a VW Golf and a Mercedes-Benz ML350 are all unmarked.
Sadly once you get to figure them out, they change the cars. Which, from what i've heard, is approximately every 6-8 months. But what an awesome way to test drive a car.