They are deep, independent, and not mainstream. However, their range of interests trend more toward the cerebral rather than the emotional. Fives love science and technology of all kinds, and a career in one of these fields would definitely be optimal. Fives also have the gift of being able to work independently, which is critical in research positions, which they would also enjoy. Long hours of study and alone-time with something gripping and engaging will appeal to this type. More extroverted types would shy away from and/or become bored with some of these positions. Fives can really make a difference in the world through pioneering (and sometimes isolating) research!