What are some alien tropes you cant stand? What are some that you like? I feel like its all been done before, haha! what are some really wacky ones? I'll go first: "little green men" trope of aliens as 4 footed, big headed, black eyed mute, psychopathic creatures. Empath aliens (i.e. Mantis) Super power "human" aliens (i.e. Clark Kent, and the alien characters from Rosewell) parasites/hosts that pass as human keep it going!