My vote for "Best Vanity Plate". Now for license plate frames -
I leave work late, the car in front of me is a 7 Series BMW coupe, guys in a suit, lawyer type.
As I get closer, I can see his license plate frame says "My Other Car is a Piece of Shit" !
He sees me absolutely howling in his rear-vue mirror and gives me a thumbs up!!
100% True