When you reject a like or dislike suggestion, your sim gains a no opinion trait that prevents that same preference to be suggested again.
Music:
trait_SimPreference_NoOpinion_Music_All
Activities:
trait_SimPreference_NoOpinion_Activities_Comedy
trait_SimPreference_NoOpinion_Activities_Cooking
trait_SimPreference_NoOpinion_Activities_Fishing
trait_SimPreference_NoOpinion_Activities_Fitness
trait_SimPreference_NoOpinion_Activities_Gardening
trait_SimPreference_NoOpinion_Activities_Guitar
trait_SimPreference_NoOpinion_Activities_Handiness
trait_SimPreference_NoOpinion_Activities_Mischief
trait_SimPreference_NoOpinion_Activities_Mixology
trait_SimPreference_NoOpinion_Activities_Painting
trait_SimPreference_NoOpinion_Activities_Piano
trait_SimPreference_NoOpinion_Activities_Programming
trait_SimPreference_NoOpinion_Activities_RocketScience
trait_SimPreference_NoOpinion_Activities_VideoGaming
trait_SimPreference_NoOpinion_Activities_Violin
trait_SimPreference_NoOpinion_Activities_Wellness
trait_SimPreference_NoOpinion_Activities_Writing
trait_SimPreference_NoOpinion_VideoGaming
trait_SimPreference_NoOpinion_Activities_Baking
trait_SimPreference_NoOpinion_Activities_Photography
trait_SimPreference_NoOpinion_Activities_DJMixing
trait_SimPreference_NoOpinion_Activities_Dancing
trait_SimPreference_NoOpinion_Activities_Singing
trait_SimPreference_NoOpinion_Activities_Acting
trait_SimPreference_NoOpinion_Activities_MediaProduction
trait_SimPreference_NoOpinion_Activities_Debating
trait_SimPreference_NoOpinion_Activities_Robotics
trait_SimPreference_NoOpinion_Activities_RockClimbing
trait_SimPreference_NoOpinion_Activities_Skiing
trait_SimPreference_NoOpinion_Activities_Snowboarding
trait_SimPreference_NoOpinion_Activities_CrossStitch
trait_SimPreference_NoOpinion_Activities_EquestrianSkill
trait_SimPreference_NoOpinion_Activities_NectarMaking
Romance skill is missing no opinion trait unfortunately.
trait_SimPreference_NoOpinion_Activities_Wellness
trait_SimPreference_NoOpinion_Activities_PipeOrgan
trait_SimPreference_NoOpinion_Activities_Bowling
trait_SimPreference_NoOpinion_Activities_Knitting
trait_SimPreference_NoOpinion_Activities_GemologySkill
Fashion:
trait_SimPreference_NoOpinion_Fashion_Basics
trait_SimPreference_NoOpinion_Fashion_Boho
trait_SimPreference_NoOpinion_Fashion_Country
trait_SimPreference_NoOpinion_Fashion_Hipster
trait_SimPreference_NoOpinion_Fashion_Outdoorsy
trait_SimPreference_NoOpinion_Fashion_Polished
trait_SimPreference_NoOpinion_Fashion_Preppy
trait_SimPreference_NoOpinion_Fashion_Rocker
trait_SimPreference_NoOpinion_Fashion_Streetwear
Sim Characteristics:
trait_SimPreference_NoOpinion_Characteristic_Ambitionless
trait_SimPreference_NoOpinion_Characteristic_Argumentative
trait_SimPreference_NoOpinion_Characteristic_Cerebral
trait_SimPreference_NoOpinion_Characteristic_Egotistical
trait_SimPreference_NoOpinion_Characteristic_EmotionalDecisionMaker
trait_SimPreference_NoOpinion_Characteristic_Funny
trait_SimPreference_NoOpinion_Characteristic_HardWorker
trait_SimPreference_NoOpinion_Characteristic_HighEnergy
trait_SimPreference_NoOpinion_Characteristic_Homebody
trait_SimPreference_NoOpinion_Characteristic_Idealist
trait_SimPreference_NoOpinion_Characteristic_KidEnthusiast
trait_SimPreference_NoOpinion_Characteristic_Mischievous
trait_SimPreference_NoOpinion_Characteristic_NatureEnthusiast
trait_SimPreference_NoOpinion_Characteristic_Optimist
trait_SimPreference_NoOpinion_Characteristic_Pessimist
trait_SimPreference_NoOpinion_Characteristic_PetEnthusiast
trait_SimPreference_NoOpinion_Characteristic_RomanceEnthusiast
trait_SimPreference_NoOpinion_Characteristic_Spirited
Conversation Topics:
trait_SimPreference_NoOpinion_Communication_Affection
trait_SimPreference_NoOpinion_Communication_Arguments
trait_SimPreference_NoOpinion_Communication_Complaints
trait_SimPreference_NoOpinion_Communication_Compliments
trait_SimPreference_NoOpinion_Communication_Deception
trait_SimPreference_NoOpinion_Communication_DeepThoughts
trait_SimPreference_NoOpinion_Communication_Flirtation
trait_SimPreference_NoOpinion_Communication_Gossip
trait_SimPreference_NoOpinion_Communication_Hobbies
trait_SimPreference_NoOpinion_Communication_Interests
trait_SimPreference_NoOpinion_Communication_Jokes
trait_SimPreference_NoOpinion_Communication_Malicious
trait_SimPreference_NoOpinion_Communication_PhysicalInimacy
trait_SimPreference_NoOpinion_Communication_PottyHumor
trait_SimPreference_NoOpinion_Communication_Pranks
trait_SimPreference_NoOpinion_Communication_SillyBehavior
trait_SimPreference_NoOpinion_Communication_SmallTalk
trait_SimPreference_NoOpinion_Communication_Stories