I would also take issue with reasonableness of the request. You concede it does not offend you, and that it's merely a preference. I also have a myriad of preferences about speech: the intonation, accent, the grammatical constructions, the words, etc. To ask of other people, whom I don't even know intimately, to match my preferences is something else altogether. It's to impose my preferences over that person's dialect or ideolect, which is also rightly frowned upon.