I rewrote my story like three or four times. Right now I am trying to write the first Protoss POV chapter but I am having trouble because the protoss are too similar to the terrans for my tastes. Pretty much every aspect of their culture and psychology comes from human history: ancient egyptian architecture, roman military and government titles, tribes distinguished by culture and skin tone, their anatomy is too humanoid (human proportions,
human skull, chins/jawbones, mammary glands, belly buttons), etc. All the aspects of human civilization neglected by the terrans are recycled for the protoss.
I cannot just rewrite them to be less humanoid because that would offend my readers or something. The only way I can think of to get over my mental block is too make the protoss hominid descendants from an alternate timeline or something.