Although the subpersonalities take turns using your body, they do not thrive on the same kind of food you do. They are energized and sustained by impressions.
For example, let's say that in a room full of people, there's an individual who is dominated by a subpersonality which has a need to feel superior. What kind of impression will feed it? Well, it will seek out a person dominated by a subpersonality which thrives on the impression that they are inferior. In this way the superior one is able to feed on the impression that they are better, and the inferior sub-personality will feed on the impression that the other person is better than they are. So, both the superior subpersonality and the inferior receive the impression they need to survive.
I have become more aware of my feelings when I am in a group. Who makes me comfortable? Why do some people bother me? Who do I spend time talking to? Who is it that I can hardly wait to get away from? I'm always asking myself these questions. Try it! Asking yourself these kinds of questions can expose the hidden agendas of your subpersonalities.
This exercise is just the beginning. To quote one of my favorite teachers, Maurice Nicole:
It's a marvelous thing to find you can move in new directions internally and escape from this spurious invention of yourself.
Just say to yourself: "Why am I always like this? Why do I always feel like this? Why, in short, am I always the same fixed person, with the same points of view, the same attitudes, the same little unpleasantness, the same judgments, the same dreariness, the same criticisms, the same thoughts, the same reactions?"
Now you know this is called: "The realization of one's mechanicalness," and this [is also] called: the first stage of Self-Remembering."
Why? Because it means that a person who begins to see internally his or her mechanicalness has already separated something from what they have taken themselves [to be].