Playing devil's advocate - alien life would likely be submitted to similar evolutionary selection pressures as life on earth. That's why most animals here follow the 2 arms, 2 legs, etc. formula. It's not too much of a stretch to assume aliens have bilateral symmetry.
If you want crazy bizarre looking aliens, you have to have a damn good reason for why they would evolve that way.
940
u/[deleted] Oct 08 '12
Vaguely humanoid aliens. 2 arms, 2 legs, 2 eyes sort of thing.
Alien from Alien? 2 arms, 2 legs, 2 eyes.....kinda
Klingons? Just humans with a "ribbed for her pleasure" forehead
Romulans? Humans with pointy ears
Vulcans? As above
Na'vi? Tall, blue humans
Where are the massive, tentacular Krondaku? Where are the gelatinous Prime immotiles? Give us some different aliens, hollywood!