Actually that's a thought, what fandoms would all the Egos be into?
Dr. Iplier, the Jims, and Green are all Star Wars nerds
Yellow and Blue are the Star Trek nerds who constantly get into fights with the Star Wars Nerds
Bim is usually stuck in the middle of their arguments because he likes both (but is actually more into Harry Potter). He’s into musicals and his favorites are Little Shop of Horrors and Wicked
Dark is the edgelord who says he watches Game of Thrones but actually only ever watches Brooklyn 99
Wilford is a huge fan of cartoons and watches the shit out of Gravity Falls, Steven Universe, and Star vs (is the master of avoiding discourse)
I like to imagine that the Host is in a good mix of book fandoms ranging from Artemis Fowl and Percy Jackson to Les Miserables. He’s also in a bunch of musical fandoms.
Yandere’s into BBC Merlin (bitter about the ending) and NBC Hannibal (bitter about never getting season four)
The King of the Squirrels is totally in the We Bare Bears fandom if only because it’s really cute.