One instance where I am somewhat numb to something that others are not so much. Respect for peoples personal time and dignity.

Historically, Most people I knew did not respect mine. If my father had a friend who needed to move, I found out about it when I got home from school. (and my sister who would do the same later when I got home from work). So for me it was a lesson in learning that one should respect other peoples time. As for dignity...Well I tend to be blunt. No one has pulled punches with me in life growing up when it came to feed back, So. Well It was not until much later that someone sat me down and walked me though why one should not say what they see.
((Occasionally I convince myself that I am paranoid and my relations are not that toxic, But then I talk to them for ten minutes and I see it again))

Although In the past few years, I began to enforce on my personal boundaries, And got very very rude about it. It seems that was the language that worked for my relations. My father will be like "help me put up a barn" And I'll reply "We have done this before, You use crap used and rotted wood, and you refuse to let anyone build it right, **** you. I'm modeling a character now"...That bluntness is fully intentional. Its what is related to express a no, and a why. and hint at the terms that might give a yes.