Based sub-categories the game already has:
TV Channels
Movie Genres
There already is a system for movie genre preference, so maybe they can add 'Movies' as a TV Channel like/dislike option
Temperature/Seasons/Weather Types
This also has it's own preference system from Seasons, but the social wheel is already so cluttered it could be cleaned up by attaching this to likes/dislikes.
Food
Dine Out recognizes categories for dishes like Italian/Seafood/Vegetarian/Experimental
Fashion
I'm surprised this isn't in, but maybe it will come when an 'attraction' pack comes out.
Commercial Venue Type
This might dictate what kind of venues a sim likes to frequent, like Libraries/Karaoke Bars/Art Centers/Spas