In the hopes that people who started reading the other thread will get down to mine after the hokum in the past several postings, here's my story:
Mom 'n' Opp because I'm a mom and I'm an Opp (part of my last name). I came up with this idea when I lived in VA where almost everyone has a personalized license plate. I had a limited number of letters I could use and wanted it to be something unique about me.
Alas, I left VA before I could get such a license plate, but in almost everything I do on line I use "momnopp".