My pet peeve?
US-specification automobile license plates.
Here is, for example a 2015 BMW 3-Series with a US plate
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And its European spec. alternative:
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The European-style license plate is, on just about every level, vastly superior.
Not only is it narrower, fitting into todays sleek, aerodynamic body designs much more cleanly; but its simple large characters are much more easily read by traffic-control systems. And remarkably free of the hideous clutter that turns most US plate designs into hideous billboards for the questionable charms of various locales:
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If you want to tell the world how much you love dolphins - buy a bumper sticker. Lets start a movement, here, to bring sanity to the humble US license plate.