Since I tend to use a lot of hyperbole when I speak/write, people often think I'm upset when I'm not. I'm just really passionate about everything I do in my life and I use words with power behind them. I blame it all on my husband and an ex-boss of mine.
My husband said to me: "Always try to get your point across using as few words as possible". In order to do this in most cases, you have to use words that negate loopholes. This comes across as forceful and condescending. I've backed off that theory with society, but I still apply it when it's just me and him talking about things.
Ex-boss said to me: "When you answer the phone, you sound like a little girl, no one knows if they're calling a business or a porn store." I'd have kicked his ass right then and there but he was family by association.
Those two things really shaped the way I communicate and I have learned that not everyone can deal with it, but I rarely get genuinely upset. If I'm annoyed by something, I express it with sarcasm.