Disagreeable women outearned agreeable women by 5.47 percent, an average difference of only $1,828 per year, the researchers said. According to the researchers, agreeableness is one of the basic personality traits found to have a strong genetic basis and about half of the variation between people's agreeableness is controlled by genes. Warmth and cooperation would seem to be beneficial traits in the workplace, but earlier studies had found that, on the contrary, agreeableness is not associated with career success.