The instincts of the Enneagram types are self-preservation (sp), sexual (sx), and social (so). They are traditionally used to define three instinctual subtypes or variations of a basic type (e.g., SP 7, SX 7, and SO 7). One of these three subtypes is called the counter-type because it can look different from the basic type. Below are brief descriptions of the three type 7 instinctual subtypes.
SP 7 - Like-Minded, Family: networks with like-minded people who support self-interests; on the lookout for opportunities that satisfy their interests and needs; finds good justification for behavior in pursuit of self-interests.
SX 7 - Fascination, Suggestibility: lured or pulled by imaginings or fantasies that embellish reality; an optimism of someone who’s in love; can be easily overtaken by enthusiasm and fascination for an ideal.
SO 7 - Sacrifice (counter-type): postpones or defers desires and gratification in favor of pursuing an ideal; moved by duty and recognition toward service of humanity; seeks recognition and applause for being good according to social consensus.
While an individual may be identified with type 7 in general, that same individual may be more specifically identified with one of the three instinctual subtypes as well.
A more recent approach to using the instincts is instinctual variant stacking which can be used independent of Enneagram type.