As someone who has been interested in marketing, media and culture since I was very young and through careful observation in an independent lifetime cultural anthropological study, I have learned much about my fellow humans and I have been guilty of these traits myself since I am human:

An increasing self-absorption that can become mutually exclusive of the other.

An attention span that lasts a minute if you are lucky, or you have discovered an entertaining hook that could make the person's attention span last even longer than a minute.

Unless you are in front of the person doing whatever you do, you are in limbo or at least hanging in a closet.

People most prefer to talk about themselves - this is the death of the sales person and I have to keep my own talk in check in most human interactions but especially when looking out for the best interests of clients. I can do this so well that often my clients never think of me as having a life separate from their needs.

People can't deal with real life and death and prefer to, and seek out escapes.

People believe things and hold on doggedly to those beliefs despite repeated evidence to the contrary.

People measure themselves by other people and what other people have instead of examining where they themselves are and where they want to go independent of others.

People need others to think just like they do for validation without feeling a need to consider and respect differences in thought or other perspectives.

People lack patience because patience is not valued but instant gratification is expected like quick fix pills.

People try to change or control other people despite the fact that the only person they can change or control is themselves.

When marketing and selling, I try to use these observations in the most genuine way possible while still keeping other's best interests in mind. I want that person to truly want what they are buying, not because someone else has it but whatever they are buying has been something they have truly and independently wanted in life.