And if you were an octopoid with a brain safely in the middle of the body and a few spare eyes scattered strategically around your body you'd think that was the only natural and sensible way to organise a body's body, Mrrzy.

Galaxy Quest got round this rather neatly by having the humanoid bodies being just an illusory appearance to improve relations between with Earthlings (and they really looked rather like the characters I described in the last paragraph.)

And Jar Jar Binks was humanoid Grab - if he hadn't been there wouldn't have been all that fuss. (I liked him as it happened, and thought the fuss was phony and misdirected.)

Noone has mentioned my favourite version of Star Trek - Pigs in Space from the Muppets. "Star Trekking across the Universe..."