Grumpy

Grumpy is a social trait in The Sims 3. It conflicts with the Excitable and Hot-Headed traits, and is available from birth.

Grumpy Sims are rarely in a good mood. It's quite difficult to make them happy because they simply don't want to be happy.

Behavior

Sim will usually get sad before getting angry or uncomfortable.
It's more difficult to get the Sim into a good mood.
On the computer Grumpy Sims have the option to "Troll on Forums." This will eventually result in a positive moodlet.
Sim doesn't like to boast or enthuse about something.
Provides a bonus to Sims writing in the Satire genre.
Sim may become sad or angry when they don't have any moodlets.
Sim may scream out in fury if something bad happens to a nearby Sim.
Sim will always have the ability to complain about something. And will give them the positive "Let off Steam" moodlet when doing so.
Sims with the Grumpy trait can develop the "Out of Sorts" moodlet upon awakening. The "Out of Sorts" moodlet gives -20 points to your mood, and it typically last 23 hours. The "Out of Sorts" moodlet occurs at random. Getting a good night’s rest or, for Sims with the Martial Arts skill, meditating can help to alleviate The "Out of Sorts" moodlet much faster.