Hidden traits

In addition to the 60 traits, there are 8 hidden traits that child could inherit from their parents. Some of this are generated from NPC's.

Pyromaniac

align=left Ignite random things around you, can flambè fruits,

Immune to Fire

align=left Sim becomes fireproof

Makes No Messes

align=left Sim will not make any mess

Burglar

align=left Sneak anywhere

Can apprehend Burglar

align=left Should be able to apprehend burglars

Can Salute

align=left "Salute" appears under Friendly pie menu

Pizza Appreciator

align=left More positive mood points for eating pizza

Rocker

align=left Natural feeling of rock-stardom

The Sims 3 World Adventures hidden traits

With the expansion The Sims 3 World Adventures there are few new hidden traits.

Asian Culture

Chinese-themed idle animations, chopsticks, etc

Egyptian Culture

Sing Middle Eastern songs autonomously, etc

French Culture

Sing French songs autonomously, etc