Vegetable: I'd be some sort of inedible, poisonous vegetable that if someone bit into me, they would die >=[
Animal: I'd be a... human :O!. Because humans have computers and in general have control of the world ;o.
Video Game character: dunno... Falco from SSBM maybe? it would be cool to be a bird with weird reflector sheilds and a laser and stuff =d.
Pokemon: Mew. Surprised? Well consider that I'd spend 99% of my time transformed into an Aipom, but I'd have legendary status and psychic power to boot =d.