It appears that the degree to which our instinctual drive's impulses control our lives is subject to the same kind of energy as our Enneagram point. For example, we can experience our drives and passions mildly or intensely; we can feel some sense of control or very little control at all; and in addition, we can either embrace our particular instinctual drive or act totally against it. It is important to note that whether embracing the drive as an asset or viewing it as a liability it is still ever present and influential.
More specifically, our dominant instinctual drive is, in actuality, our area of greatest weakness. Thus, when our sense of "survival" is threatened something has triggered whatever "button" happens to relate not only to our Enneagram point but, more important, also to our instinctual drive. The fixation then becomes even more severe as we take on the additional fears of the instinctual drive. The important factor here is that the triggering element of the fixation is the instinctual drive's issue. Nevertheless, the flavor will always be that of the Enneagram type, as the fixation and the drive are interactive, linked, and always related to the Enneagram type.
In the context of the "false self" or personality, it is the instinctual drive that supposedly protects the survival of the Enneagram point and is called to the front lines when in stress. However, since the dominant instinctual drive is actually one's "weak link," its entrance in times of stress may ultimately produce no "protection" at all to one's survival, and in fact, may exacerbate the level of stress and ultimate fixation.
The real question is, how do we express anger, fear and desire? How do we experience illness and what types of illnesses do we have? How do we act when we're happy or sad? As an example, ask yourself how you like to spend your time. Do you tend to make sure your own needs are met and satisfied with the essentials of life (self-preservation)? Or does your attention go to being in the company of others and, if so, how many others, and/or do you need to be in service of others (social)? Or instead do you find that your ultimate expression of self is linked to the company of one significant other in an intimate and profound way, and that no matter where you are or what you are doing, you are always in search of that beloved special person (sexual)?