Understanding ourselves is the first step to connecting with others. With this tool you'll affirm what you already know, and gain new insight into areas of your personality that you may not recognize.
Self diagnostics are prone to fatal errors (you might actually be a poor predictor of your own future behavior), but this process is still useful in creating a meaningful baseline to work from.
So the best way to approach this is to read the situation or context, then choose the response that fits you best. Not how you wish you were, but how you know yourself to be. Go with your first instinct, and you'll be good to go.