Mostly I find myself constantly amused by how far into tropes and caricatures the characters get. They could play everything straight, and with Apollo they get dangerously close to doing so, but then Hades will physically back away quickly if anyone gets too close to him, everyone strips at the beach to flowery backgrounds and borders, and Zeus changes the seasons at the snap of his fingers. We literally go from spring to summer to fall in one episode. Everything's so ridiculous and over the top that you can't help but laugh.
Tokyo Ghoul is set in an alternate reality where ghouls, individuals who can only survive by eating human flesh, live among the normal humans in secret, hiding their true nature to evade pursuit from the authorities.
Ken Kaneki, a normal college student who, after being taken to a hospital, discovers that he underwent a surgery that transformed him into a half-ghoul after being attacked by his date, Rize Kamishiro who reveals herself to be a ghoul. This was accomplished by transferring Rize’s organs into his body, and now, like normal ghouls, he must consume human flesh to survive. Struggling with his new life as a half-ghoul, he must now adapt into the ghoul society, as well as keeping his identity hidden from his human companions.