"Old habits die hard."
One habit that I am actively trying to change is to refrain from asking people what they do for work shortly after I meet them. It is rooted deep within me and, in my opinion, most Americans. I never ever considered it as a problem until a couple from Spain enlightened me:
Most Americans are quick to ask you "what do you do" in there opening introductions. Your answer, be it waitress or tech millionaire creates a lens through which others see you.
What we "do" is just one of the many aspects of who we are. I suppose that I have always sized people up this way. Intentionally and as an involuntary habit. I had seen it as a social norm and, at the same time, was curious to know.
By avoiding this question, I hope to make better evaluations of character.