My brother (a year and a half younger) was also constantly making noise, but instead of desensitizing me, I went the other way!

For whatever reason, when people don't push in their chairs and I have to walk around them really irritates me. I have no idea why - it's one step, what's the big deal?

Thank you for commisserating and helping me feel less like a lunatic! It's always the little things that annoy, isn't it? Probably because it's acceptable to complain about the big things and get them off your chest, but the little things are left to fester and grow until they explode.