Seems too obvious to assume the aversion for the red color is related to the fact that our blood is red. An injured or dead member of our tribe, all covered in blood, is an alarming sight.
The whole concept of Avatar (yes, Cameron's movie) is about people experiencing life in the body of other people. Blue people, in this case. Not to mention Call Me Joe and the whole bunch of original texts that *inspired* Cameron. Isn't that what we do with our Avatars in Second Life or in any of the hundreds of virtual worlds out there? There's this movie called Gamer where they use nanites to get full control of other people's bodies. Do The Surrogate (Comic and Bruce Willis movie) robot bodies count? Ghost in a Shell anyone? Damir Lukacevic's movie Transfer: Herman and Anna, a wealthy aging couple decides to extend their lives by leasing the bodies of two young Africans. For one million euros, the Africans signed away their lives for 20 hours a day, but in the 4 hours a day they have back in their own bodies, they begin to regret the arrangement. A short story I recently read: The Last Stand of the Elephant Man, where Merricks body is fashionable in the strange society of the future. What about Adam-Troy Castro's Arvies, when it's the posthuman fetuses who take control of human bodies? Creepy! Talking about unborn pupeteers, there's Special Delivery by Damon Knight where superinteligent Leo takes control of his mother's body from within the uterus. Ben Bova's The Winds of Altair, another inspiration for Cameron. James Blish's Cities in Flight? if the Surrogates had tentacles. Carlos Gardini's "Los Ojos de un Dios en Celo" about an anthropologist who studies a tribe by seeing through the eyes of members of the tribe. Aliens jumping into human bodies count? if so, there's Heinleins The Puppet Masters, Night of the Creeps, The Body Snatchers movie with Nicole Kidman, the Outer Limit's From Within episode (mind controlling worms), The Host by the Twilight writer, Robert Silverberg's Passengers and maybe Darryl Gregory's Pandemonium are a little too near the demonic possessions to make the list, as well as D.K. Thompson's St. Darwin's Spirituals.