28 Feb ISFJ, Career, Type Description, Productivity, Quotes, Weaknesses, Recruitment & Team Building What are the drawbacks of being an ISFJ person? ISFJs tend to be workaholics that are often misunderstood and underappreciated; these can cause them resentment and undeserved suffering. (David Keirsey,1998.) What type of profession is suitable for an ISFJ person? What is the general communication style of ISFJs?