I don' know if there's already a thread about these - the funny names promted this - but here goes; 4PERVN (on a panel van), NVME, NVIT (on a BMW), EVILXR (on a beautiful black XR6), BATMAM (Black convertible Astra).
I've seen others but the memory is clogged with too much other useless information.

Ps. I don't regard skiting name plates such as ANDRE to be valid entries.