what's the difference?
also you can distinguish hiveminds by their attitude towards you: if it's positive - it's a "good hivemind". if it's negative - it's "bad hivemind". and if it's -1000 or less - it's a swarm\exterminators. kill it ASAP.
That says nothing about their overall inclinations, just their inclinations towards you specifically.
If they have a beneficial attitude towards me, that doesn't mean they're a good guy, it just means that we're probably not neighbours and he's probably not going to eat me
yet. All hive minds currently function the same, which I'll get into very shortly...
Overall inclinations is basically their AI personality: like Democratic Crusaders, Ruthless Capitalists, Erudite Explorers, Federation Builders... Their overall behavior tends to differ: You can expect your Fed Builders to throw a big permanent fed party with the other Fed Builders, Spiritual Seekers and Harmonious Collectives and Migratory Flocks tend not to start things and be good neighbours, Hegemonic Imperialists and Slaving Despots are less so unless you go out of your way to get them really like you and sign a NAP (and that's still no guarantee).
Normal empires have 17 personalities.
Hive minds have 2. Machines have 4.
All of the extra ones are locked behind civics.
Hive minds are so predictable it's boring. You encounter them, and they make mediocre if slightly threatening neighbours for a while, then when they can't expand anymore they morph into little angry wolverines and try to eat everybody. If they're a Devouring Swarm they switch it up a bit and go straight to the eating everyone bit.
Robots have a bit more to go off of, but not that much. The basic machine intelligence is the closest thing to a "generic" empire, not super aggressive but not pacifistic either, they engage in diplomacy but will go to war if they like. But they're usually picked on because normal empires just don't like them (-30 penalty for being machine intelligence unless the empire is materialist), so they're probably just going to be doing the war thing. The remainder of the 3 personalities are extremities that can be summed up as: Make the Bios Us (DA), Make the Bios Dead (DE), Make the Bios Safe & Comfy (RS).
Hive minds and Machine Intelligences lose out on a lot of customizability by having the Gestalt ethic taking up all 3 points: Unless you pick a game-changer civic, all the gestalts feel the same. To put it another way, I can easily make a couple dozen custom empires and have them sufficiently differentiated from each other, but I can't do the same for even
three hive minds. If I try, I get one Hive Mind, one Devouring Swarm, and a palette swap. And even if I fluff them as a peaceful or socially curious hive mind and play accordingly, my AI neighbours will still act the same and try to make my peaceful run as annoying as possible. Of course, if it spawns randomly as an AI empire the gestalt
will act out-of-character of my self-applied fluff and revert back to the sleeping wolverine personality that all other hive minds have.
Same with Machine Intelligences. Maybe I make a Machine Empire that started out as a collaborative project of a U.N.-like entity whose species later offed itself but still wants to fulfill their vision in the galaxy by creating a League of Metal to protect robotic interests everywhere. Maybe not even just robots, but all sentient life in the galaxy. Or maybe a different machine intelligence that's curious as to how biological life works and wants to learn more about it and later even come as close to "life" as it can (Ascension paths for Machines is something I'd love to see but that's for a different thread). Or maybe I want warbots that were made by Roboticist Klingons that ended up offing themselves somehow but still kept their aggressive programming: Not driven exterminators mind you, war profiteering's just good for business. Problem is AI will react the same to me regardless, and if the AI ends up controlling them as a random empire spawn they'll go "off-script".
So no, just LARPing isn't a solution.
I don't think just adding more civics to fill such roles is the best way to handle it either. Civics are usually either minor or moderate impact fluff pieces that are either stand-alone (ex: Cutthroat Politics, Environmentalist) or connected in some way to your empire's traits as a whole (ex: Exalted Priesthood, Aristocratic Elite, Mechanist) or true game changers (Inward Perfection, Fanatical Purifier).
Gestalt's stand-alone generic civics are fairly fleshed out for now, Gestalts have a few very-important game changers, what they're missing is the empire trait-specific civics. And the biggest reason they lack those trait and ethic-specific civics is because they lack, well, ethics. A hive mind is a hive mind is a hive mind. Unless it's a swarm. Then a swarm is a swarm is a swarm. The AI plays them all identically and unless the player goes way out of the way to do things differently, they play identically too.
(Even Fanatical Purifiers have more leeway than hive minds, you can make them regular Space Jerk flavor with the Militarist ethic or you can give them a pinch of Deus Vult with the spiritualist trait and purge the xenos in the name of Starship Trooper's God Bug or whatever. You can also use some of the more interesting civics along with them as well like Post-Apocalyptic.)
Compare to the recent Megacorps: They have one Game Changer (Criminal Heritage), some generic civics (trading posts, brand loyalty) and a few empire-specific civics (Gospel of the Masses, Indentured Assets, Naval Contractors). You may not be able to differentiate a Megacorp as much as a regular empire, but it's still a good amount, and it's way more so than the Gestalts.
Gestalts could, and I argue
should, be able to make use of ethics. Hive minds should also have an expanded list of AI personalities to build off from so the AI actually plays them differently. But I also think Gestalt should only cost 1 point, like 3 as it is now, or 2 as has been suggested, to make it more flexible. A hive mind, as it is in Stellaris, is a single-minded, that doesn't mean all hive minds should have the same outlook as they do right now.