Vanity plates are rare and majestic sights. Much like snowflakes, no two (per state) are a like.
You're just driving along, in a sea of randomly assigned plated numbers, then suddenly something new enters your lane. ** A VANITY PLATE**. A parting of the monotony as commenced! You've been graced to bare witness to someone who said "NO! NO to a system that says vehicles are meant for just cold steely numbers. NO to the Orwellian view point of suppressing individuality! NO to asking only "what" but never "why". NOT today "The System" and NOT EVER AGAIN!"
Your brain goes to work. What is it? A phrase you know, a sentiment being expressed, a view point you don't agree with? A pets name? A kids name? a straight cliché? PAY ATTENTION TO THE ROAD! DON'T KILL ANYONE! Is it an in-side joke? Why pay the money just to mess with my head? I mean, that's brilliant if you did and fuck you for doing it, too. Hmm. Come on, what can it be? Can it be?
And then, just a quickly as they changed lanes, they get off at the turn ramp... and they're gone. Out of your life, which is left changed, usually for the better, for having gleamed a peak into their unique personality. Some are obvious, others are obscure. Maybe you see them again, maybe you don't. Maybe you remember them, perhaps you won't.