I have a private plate on my bike, or rather something that means something to me and a few people that know my name and are switched on. To anyone else it's a normal plate. Sometimes I fancy spacing it out to be more obvious but that takes away part of the appeal.
The plate is SP02ELL... And my surname is Powell.
My wife has the CP version, my dad the RP one and my step mum the PP one. So to us they mean something, but rarely does anyone mention it.