We all have different strengths and weaknesses as well as different annoying little habits. With that in mind, we need to be ever mindful of how we react to others who might be getting on our nerves a bit. While it is easy to snap a sarcastic or even hurtful comment when these traits pop out, there is nothing productive that can come of your action. Instead, you can overlook the event, gently point out that this habit or act might not be appropriate, or just ask the person politely not to do it again because it bothers you. And you might even invite the same reminder if there is an annoying habit that you display from time to time. All of these acts will have a positive outcome.
We are all different, we all see the world just a tick differently and fortunately, we all have our own little quarks. But that is what makes us who we are and keeps life interesting. The world would be so boring if we all drove around all day with our turn signal on for no reason, or left our dirty coffee cup on the counter right next to the dishwasher instead of putting it in the dishwasher. But what should unite us is our ability to be forgiving because we will certainly appreciate the same consideration when we slip up a bit.
I agree. If you want kindness, you need to give it. If you want understanding, then give it. You want love, then give it and all the other good things in life that we want. It always comes back to you. But first, you must give it.