A friend of mine put about 25 air horns on his car and the state actually gave him "HORNY". Of course he proceded to remove all the horns!

FUROSHS
THRL RYD

The ones I hate are those that don't mean anything. You try and try to figure them out. I followed a guy into a station once after trying for about 10 minutes to understand his plate. It was something stupid like my dogs initials and birthday.
Don