The Redwall book series:
Furries would love it, because it features anthropomorphic animals.
Warhawks would love it, because each book features at least one battle.
Loremasters would love it, because the setting of the books is unique and with a finely crafted history.
Poets would love it, because each book contains multiple rhymes/songs/poems/riddles which relate to the aforementioned intricate lore.
Writers would love it, because of the meticulous detail put into the narration.
So if everyone could find something they enjoy about it, then just where is the fanbase at?! It baffles me!