WASHINGTON: Being a nice guy is perhaps not good always, at least for your career, as a new study has found that men with disagreeable personalities are 18 percent more likely to earn more than their sweet and gentle counterparts. The study, to be published in the Journal of Personality and Social Psychology, found that nice guys don't get ahead in salary negotiations, but they don't finish last either - that position is left for women, whether or not those women are agreeable.