[Sorry for the short rant below, I love finding opportunities to rant about my villains!]
My antagonist's favorite food to eat is...flesh. Like human flesh. He was raised in a cult for all his life, brought up under the idea that everyone in his family are 'Hunters' and that anyone outside are 'Prey'. Although he doesn't particularly find human meat absolutely delicious in the beginning stages-
Once he arrives in a new world? His body completed transformed from that inside of a human? Human meat becomes his main meal source, and it's even worst seeing as since he's in a position of power, he'll just order people to deliver sacrifices to him on a daily.