The More Agreeable You Are, the Less Money You’ll Make
Do you remember the proverb, "Nice folks finish last"? It's typically used when discussing romance, but it may actually be applied to any circumstance in which a kind and compassionate attitude would be preferable to a more forceful and possibly dishonest one. And it turns out to be terribly true in business. Less money will be made by you the more agreeable you are as a person at least if you're a male.
According to research, agreeable men tend to earn less money, whereas a woman's earning potential is unaffected by this. Mind you, this is not good for women. They simply have no advantages in either case, whereas a man benefits if he is viewed negatively. A difficult man is viewed as tough, skilled in negotiations, etc. What does pleasant mean then? being sympathetic, helpful, and amiable. You know, the stuff you wish to teach or learn from other people. You'll also receive fewer promotions and less pay.