Mm--yes, we all have things that get on our nerves, like the FF said "dis" gets on his. And even worse, most people, I think, can tolerate a particular thing most of the time, but has other times the thing sends them through the roof! (Maybe they're having a bad day, like everyone in my household did today.)
And, some people are just more sensitive than others.
Another problem occurs when someone makes judgments too soon. I read this little story years and years ago, and it made such an impact that it has stayed with me:
A man and his wife were taking a drive out in the country. They drove slowly past a farmhouse on a corner lot, and could see the farmer hoeing his garden--while sitting in a wooden chair. The husband said to his wife, "Well, if that isn't the heighth of laziness: sitting down to hoe". They turned the corner and took a last look back at the man...to see that he only had one leg.
