Dearest Veeky Forums

the killiks in SWTOR were done really well

You can leave the hivemind at any time. It will be sad to see you go, but understands that this is something which happens. You're also free to rejoin at any time. In fact a lot of people take breaks from the hive mind, often coming back after a couple of years. This is deliberate strategy so it doesn't come off as one of those consume all consciousness ones which occasionally pop up and are eradicated for being dicks. This hivemind still wants to absorb all sentient life, but is happy to take it slow and wait a couple of hundred thousand years.

>Leave the players seriously questioning whether they themselves are part of a hive and dont know it.
FTFY

>A hive mind is nothing but a normal mind
Hive body might be a better term since it's not the single mind that makes them different but that it's spread among multiple bodies.

Give it hobbies and the capacity for loneliness to humanize it. When the PC space explorers first land on its homeworld, they find it using millions of drones for pointless, minecraftian megaprojects, motivated entirely by boredom.

Two words for you, OP:
Fregoli delusion

Look up A Miracle Of Science for one approach.

It is a webcomic with a planned out story line that finished some years ago. Yes, really.

>Good as in not evil, or good as in not shit?

Good as in not evil.

Make it bound to a religion, and show that despite how the government is using it to make everyone think alike, there are other interpretations that value free thinking.

Pic unrelated.

clarkesworldmagazine.com/watts_01_10/

"It won't be easy. They won't understand. Tortured, incomplete, they're not able to understand. Offered the greater whole, they see the loss of the lesser. Offered communion, they see only extinction. I must be careful. I must use this newfound ability to hide. Other things will come here eventually, and it doesn't matter whether they find the living or the dead; what matters is that they find something like themselves, to take back home. So I will keep up appearances. I will work behind the scenes. I will save them from the inside, or their unimaginable loneliness will never end.
These poor savage things will never embrace salvation.
I will have to rape it into them."

Make it a simple matter of perspective.