I'm A Splitter.  

Splitting: A mental mechanism in which the self or others are reviewed as all good or all bad, with failure to integrate the positive and negative qualities of self and others into cohesive images. Often the person alternately idealizes and devalues the same person. From a psychoanalytic point of view, splitting is fundamental to borderline personality disorder, and underlies the dramatic shifts in the person's experience of self and others and their difficulty in finding a stable adaptation to life.