A personalized license plate is less permanent than a tattoo, but can be more public as well as more of a reflection of the owner's habits, likes, and personality.
I was driving one day when I spotted this plate:
Assuming the person driving this Cadillac was the owner, I could only wonder what compelled a middle-aged black woman to get ALPACINO as her license plate. Could someone be that much of a fan? Does she have Scarface or the Godfather trilogy playing on her dashboard DVD player?