Happy

Happy is an emotion available in The Sims 4. It occurs when a Sim performs a positive interaction, succeeds in an interaction or enters a room with wall decorations. Having Happy moodlets will boost the effects of other positive emotions like Flirty, Focused, Inspired, Energized, Playful and Confident.

Interactions and Activities

Sims will only have a chance to use these interactions and do these activities while happy.

Interactions 

• Brighten Day
• Heartfelt Compliment

Supportive Traits

"Happy" can evolve into "Very Happy".

These traits affect how often a Sim is happy.

• Cheerful
• Sims that Love Outdoors will become Happy when outside.
• Good Sims will become Happy when around Sims feeling positive emotions.
• Evil Sims will become Happy when around Sims with negative emotions.
• Bros become Happy when around other Bros.
• Loners become Happy when alone.

Object Auras

These are items found, bought, or earned in the game that can emit a happy aura in the area around the object. Players can choose to enable or disable the aura at any time. Once enabled, a Sim can interact with the object, through viewing or using it, and they will earn a happy moodlet. Whether their mood changes to happy or not depends on the other moodlets affecting the Sim at that time.

Whims

Happy Sims may get the following whims:

• Dance to Stereo
• Hug another Sim
• Call Someone on the Phone
• Chat with Someone
• Tell a Joke
• Meet Someone New  
• Make a Friend  

Careers and Jobs

Sims with these jobs or careers will gain work performance if they go to work while happy.