My mum was quite happy with the standard plate on her CBR600 that she had for a while which was "#### BGU" (not going to post the full number). Until my dad pointed out that it said "buh guh U" then she wasn't happy.
Then by chance she got a Fazer with the last three letters YAY on the standard number plate, just sums a bike up really.
I keep seing a a guy with "N3WTY" on his personalised plate.