One can always try to name all the quirks that make up a person, but quite frankly it is almost too hard to amass. However I believe Sims 3 managed brilliantly with a total of 59 different traits to chose from. You are only allowed 5 traits or less in order to create you sim and once you have choosen your traits then your character is stuck with them. Unless of course they have a mid-life crisis.
Here is a list of the available traits you can use to create your character.
Absent Minded
Ambitious
Angler
Artistic
Athletic
Bookworm
Brave
Charismatic
Childish
Clumsy
Commiment issues
Computer Wiz
Couch Potato
Coward
Daredevil
Evil
Excitable
Family Oriented
Flirty
Frugal
Genius
Good
Good Sense of Humor
Great Kisser
Green Thumb
Grumpy
Handy
Hates Art
Hates Children
Hates Outdoors
Heavy Sleeper
Hopeless Romantic
Hot headed
Hydrophobic
Inappropriate
Insane
Kleptomaniac
Light Sleeper
Loner
Loser
Loves Outdoors
Lucky
Mooch
Natural Cook
Neat
Neurotic
Never Nude
No Sense of Humor
Over-Emotional
Party Animal
Perfectionsit
Schmoozer
Slob
Technophobe
Unflirty
Unlucky
Vegetarian
Virusco
Workaholic
