DiSC represents four different personality types. The D is for Driver: Characteristics include: Get to the point. Just get 'er done. Quick to anger. Extrovert and task oriented. I: Influencer: Team builders; great ideas; excellent brainstormers, creative, love to tell stories. Extroverted and people focused. S: Steadiness. Work my plan and plan my work. Excellent listeners. Don't show emotion; though feel it. Introverted and people person. C: Conscientious. Excellent detail people. Catch errors. Want data. Introverted and task focused. Good teams want all 4 styles as each style brings strengths to the team.