Forms
Of course, people need to have a form. And those forms can change with "Augmentations" and "Ascensions" which are similar to minor and major transformations. Augmentations might be something subtle, while Ascensions are more overt. Using Cybernetics as an example, an Augment might be subdermal armor implants or an enhanced immune system. An Ascension would be something like a full-body cyborg conversion (ala Adam Smasher or Briareos from Appleseed.)
Some basic forms might be...
Terran: Humans, mostly harmless.
LoGrav: Descendants from low-gravity worlds. Tall, thin, fey humanoids similar to the Syndicate from Planetfall 1
Insectile: For the swarm! Humanoid insects ala the Kir'ko
HiGrav: Creatures hailing from a high-gravity world, short, squat, and muscular. Beard optional.
Sauroid: Reptilian aliens. May or may not be shapeshifters sent to take over the world.
Silicate: Silicon-based life forms with craggly, rocklike skin.
Mutants: Roided up supersoldiers, freaks deformed by radiation, may or may not be Space Orcs.
Therians: Blanket term for the various space-anthro skins. Birds, beasts, frogs, goats, etc.