Here's some things I found when poking around the game files.
Werewolf:
- +20 mood for "Nice Nails" buff from Salon options at the spa.
- 50% energy decay rate!
- 75% bladder decay rate.
- 200% Athletic skill rate.
- 75% fatigue rate.
- 150% relationship gain rate with other werewolves.
TraitsAmbitious: 200% career performance gain rate. 4 days without increasing any skill or career level creates -15 "Anxious to Advance" moodlet.
Bookworm: 130% homework speed for self.
Charismatic: 125% relationship gain rate from socialization, and 75% relationship decay rate.
Friendly:
- Can always use "Get to Know" interaction to learn traits of other sims, under "special" interactions.
- Better results than this interaction for non-friendly sims.
- The value of this is many traits have a "talk about X" interaction for a big relationship boost. Traits with an "enthuse about X" interaction increase relationship status even faster.
Commitment Issues: 90 relationship required to propose marriage.
Computer Whiz:
- 110% logic skill from computer chess.
- 150% fun from computer games.
- 250% repair computer speed.
- 133% upgrade computer speed.
- 2% chance to get caught per 30 minutes of hacking.
Couch Potato:
- 200% comfy buff from sitting on objects.
- Attempts to sleep 2 hours past maxing the energy bar.
Diva: +10 mood in rooms with a mirror.
Evil: +50 fun motive change from seeing non-family/romantic sims die.
Family-oriented: 150% toddler train speed.
Gatherer:
- 500% respawn rate when Sim is on same lot as a spawner (fish, gems, seeds, etc).
- 30% chance of +2 harvestables per plant.
- 105% insect value.
- 145% seed quality.
- 1000% space rock value.
- 5000% ingot and gem cut value.
- +5 collectable quality when using Werewolf Hunt. (unknown if this is 5% or some other meaning)
Genius:
- 130% skill speed for Mooch, Logic, Chess, and Hacking.
- 60% chance to solve the unsolvable.
Kleptomaniac: Swipes objects within a 6 tile distance, so reduce targets within that range if you want a specific object. Also has 20% chance to steal objects from work or school, up to a maximum value of 350*career level (or 500 at school).
Mean-spirited: +10 mood from the "Enemy" buff, instead of negative mood.
Party Animal: Using the "Woo!" interaction with 3 sims gives +15 mood for 3 hours.
Perfectionist:
- 115% quality and time to complete writing, painting, cooking, and homework.
- The higher income and completion time cancel out, so perfectionists have about the same $ per hour as normal sims.
- Helps "make a book/painting worth $S" wishes, but hurts "make N books/paintings" wishes.
- Perfectionists take longer to complete skill challenges like X paintings/books written.
- Based on these numbers, especially slower challenges, I believe perfectionist is a negative trait overall.
Proper:
- +5 mood from Decorated; +10 mood from Nicely and Beautifully Decorated.
- -5 mood from Disgusted and Dirty Surroundings.
Pyromaniac:
- Can turn produce into Flame Fruit.
- Gains 50 fun and energy from eating Flame Fruit.
- 200% bonus from cozy fire buff.
Schmoozer:
- 200% grade performance rate at school.
- 150% relationship rate with boss & coworkers.
Supernatural Skeptic:
- +5 performance bonus in Business, Politics, Law, and Journalism. (unknown if this is 5% or some other meaning)
- 90% spellcrafting skill rate.
- +10% chance of failure with wands and potions.
Virtuoso: 135% monetary gain from playing instruments.
Workaholic:
- 130% homework speed for self OR helping another sim complete homework.
- Gains fun from homework, instead of losing fun.
These events never happen to sims with the "Feeling Lucky" buff, from sources like the Lucky trait or Good Luck Charm witch spell:
- Breaking objects
- Failed upgrades
- Electrocution
- Burned food
- Fire
- Burglar
Sims with the lucky buff are also:
- 10 times more likely to "win" career opportunities that have good and bad outcomes.
- 2 times more likely to get a raise at work.
Lifetime RewardsAttractive: 20 minimum relationship with newly met sims.
Bookshop Bargainer: sells books at 125% price. Useful for writers selling books they get in the mail.
Extra Creative: 25% more likely to paint a Brilliant painting, and 15% more likely to paint a Masterpiece.
Fast Learner: 115% skill gain rate.
NextBigThing: 115% celebrity points and money from gigs.
Office Hero: 200% relationship gain rate with coworkers, and 50% loss rate.
Opportunistic: 200% reward from opportunities.
Vacationer: 20% rate of performance loss from missing work.
