bipolar

(4) the unipolar-bipolar distinction is important in regard to these personality variables; the trait of extraversion (associated as it is with positive affectivity) may mean that individual variation here leads to a more bipolar pattern; ...

And in both visual artists and creative writers, there is a considerably higher risk of affective disorder, more unipolar (depression only) in artists, and more bipolar (mania and depression) in writers, and leading to higher rates of alcoholism and suicide, particularly in writers (Andreasen 1987; DeLong & Aldershof, 1988; Jamison, 1986, 1995).