I had a secret yearning for one for many years, but could never really justify it. Then one day I realised that I never spent money on frivolous things like Rolex watches and jewellery so I went out and got a plate. Cost me about £500 as I recall.
I got X3 *** (my initials) and have had it on the last 3 or 4 cars I have owned. It adds a nice touch, and it's fairly plain. I don't like the contrived ones where people make characters by 'bending' letters.
I have idly thought of one day getting a BMW X3 to really show off the plate!