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 1, SX 1, and SO 1). 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 1 instinctual subtypes.
SP 1 - Worry, Anxiety: worries about consequences resulting from things not being done right; avoids mistakes and doing things wrong so as not to be personally blamed or criticized; obsesses about details and likes to be prepared.
SX 1 - Zeal, Jealousy (counter-type): desire to reform people or society to the “right way” to be or do; feels entitled to what’s been “earned” through hard work and high ideals; angry and resentful of those who haven’t earned what they receive.
SO 1 - Rigidity, Non-Adaptable: already knows the “right way” so no need to adapt to what others say is “right”; provides example by modeling how one should be; sense of superiority can come from criticality of others for not behaving the right way.
While an individual may be identified with type 1 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.