ISFJ People of this type tend to be: cautious, gentle, and thoughtful; hesitant until they know people well then affectionate and caring; very literal and aware of the physical world; uncompromising about personal standards and easily offended; diligent and conscientious, organized and decisive. The most important thing to ISFJs is living a stable, predictable life and helping people in real ways.
How to Spot ISFJs: quiet, private and modest
hard working, conscientious and serious
gentle, thoughtful and sensitive
careful dressers with an eye for color and comfort
Tips for Communicating with ISFJs: Speak clearly and slowly; respect their privacy
Be explicit and map out the steps and details of your ideas
Honor your commitments and be prompt and thoughtful
(From PersonalityType.com)