I don't like AC because I think it's usually set to be WAY too cold, and I don't adjust well to moving between really hot and really cold environments (this actually made me sick a couple summers ago, when I went from no AC and 100+ weather for a month to a hotel for a weekend). Hate New England winter for the same reason, the buildings are always overheated. But I think a lot of the time the temperature in offices and public transport is set based on calendar date, so when there's an early heat wave or cold snap it can take a week or more to catch on.