When choosing a license plate, what are your most taboo numbers and letters?

The most taboo numbers for choosing a license plate number should be: 4 and 5, and there is no special requirement for letters. But this is not a necessary condition for driving. I don't particularly care about this. I think the most important thing is to have regular maintenance after buying a car. This is to pay attention to safety when driving, obey traffic rules, don't seize time, keep a clear head at any time and be an excellent driver.