sims have different moods depending on what happens to them. the positive moods include happy, confident, energized, flirty, focused, inspired, and playful. the negative moods include angry, bored, dazed, embarrassed, sad, tense, uncomfortable, and scared. these moods are triggered by moodlets. each moodlet has a certain number of points. for example, a moodlet may give your sim "+2 happy". whichever mood has the most points will be the mood that your sim is in at that time. sims have different behaviors depending on their mood. it also impacts their social interactions with other sims and their work performance.