What feels relaxing to one personality can feel unbearably dull to another. Boredom affects personalities in surprisingly different ways. Sanguines seek excitement, creativity, and social interaction whenever life feels repetitive. Cholerics become restless when they are not making progress toward meaningful goals. Melancholies become bored when work lacks purpose, depth, or quality. Phlegmatics tolerate routine well but still need occasional variety to remain engaged. Recognizing what creates boredom helps us design work and lifestyles that better match our natural personality strengths.