I deliberately chose to set my air conditioning unit in Fahrenheit, because the gradations are smaller. I can adjust to either, but I have more control that way.
However, what drives me crazy is grocery stores. Despite the fact that they actually charge in metric (per kg or per 100 grams), in both their advertising and in the tags in the produce department and in the meat department they show the price per pound in large numbers, but the metric price in small numbers below. It is hard to remember the metric price to be able to check the bill. For deli on the other hand, because the price is smaller, they show the price per 100 grams.