For the record, and maybe I'm showing my age, but my biggest issue was with the attitude of, "Could you please help me, but while doing so, don't waste my time with any of your happy horseshit...I've never done what you do, nor know anything about it, but I know enough to know that other than, within this tiny window, you have nothing of importance to offer me because I've already Googled EMS and know all about it..."
It's just such a common, and poisonous attitude in EMS...