I have quite a few which mean nothing to some and some interpret as something else.
I have a close interpretation of my surname, MOR664N,
another a common shortened version of surname and my initials (IM) MOG 1M
A very poor one of my first name and surname initial badly spaced on one of my bikes, L 1AN M
An interpretation (poor) of my screen name Shooter, S800TER was best I could do.
On another bike I have an 03MOG plate in case I ever get another 3 wheeler.
On my American bike I have 3DOM (freedom) just for fun as it only costs $25 a year
Have some others on the old vehicles that are dateless but meaningless, TAS116 and YYJ815 so not really vanity plates.