pffft. I have only used AC once in the 6 years I've been driving. The trick is to speed so you get more of a draft
Otherwise my current car didn't come w/it so I don't even have a choice.
The real hard part is driving to work when its hot, and then working in an -23 degree enviroment. It really, really, really sucks from the time it takes to get suited up till I get on the floor. I'm surprised I haven't gotten sick from such a drastic tempature change.