The list below contains traits that have been discovered and are expected to appear in The Sims 3. The traits are a new system which will make Sims more unique, each Sim will have a selection of 6 traits which will define how the react and communicate with Sims around them.
Each Trait will have a specific manner in the way a Sim might do something, for example a Loner Sims will not want to get married while a Nosy Sims will be poking around in another Sims business all the time.
Absent Minded
Ambitious
Angler
Artistic
Book Worm
Brave
Can't stand art
Charismatic
Childish
Clumsy
Commitment Issues
Computer Wiz
Conversationalist
Couch Potato
Coward
Daredevil
Dislikes Children
Dreamer
Easily Impressed
Evil
Excitable
Family Orientated
Flirty
Friendly
Frugal
Genius
Good
Good at Massages
Good Sense of Humor
Great Kisser
Green Thumb
Grumpy
Handy
Hates the Outdoors
Heavy Sleeper
Hopeless Romantic
Hot-Headed
Hydrophobic
Inappropriate
Insane
Kleptomaniac
Light Sleeper
Loner
Loser
Loves the Outdoors
Lucky
Materialistic
Mean Spirited
Mooch
Natural Cook
Neat
Neurotic
Never Nude
No sense of Humour
Over-Emotional
Paranoid
Party Animal
Perfectionist
Schmoozer
Shy
Slob
Snob
Stubborn
Sweet Talker
Technophobe
Unflirty
Unlucky
Vain
Vegetarian
Workaholic
Worrywart
List compiled from Articles taken from Games for Windows, PC Gamer as well as Previews posted by Gaming SItes. Able to improve on the information on this page, send us an email and we will update with the information supplied.