When I purchased my VF Calais in 2018 I wanted personalised plates too.
Originally I wanted to get my initials and birth year however it wasn't available. I ended up choosing the original number plate from my grandfather's truck which is the oldest number plate in our family's history in Australia dating back to 1952.
Rather than the traditional full size black digits on yellow background I went for the full size white digits on black background ABC 123 format with NSW at the top.
They look very nice with the car's silver colour and the number content reminds me of the old truck straight away.
I went for nostalgia rather than personalisation or relating it to the car itself