Penny for your thoughts on eldritch abominations taking a human-like form?Traits that their presentation should have, quirks, and such?
The way I see it, the term eldritch abomination has a pretty distinct meaning these days: the generic big tentacled monster of post-Lovecraftian media, the ‘old gods’ or ‘elder gods’ that probably have an apostrophe in their names somewhere, who posses a host of powers derived from misconceptions of Lovecraftian horror, like ‘drives things insane by mere presence’, that kind of thing. Eldritch abominations have little to no relation to actual beings portrayed in cosmic horror, they don’t serve the same thematic purpose, so really it’s up to the writer just what exactly the traits of such creatures are. All you’ve got is the paint job of ‘really big tentacle alien’. They’re almost always overtly malevolent and monstrous, have some sinister, hidden motive only a madman would find appealing. Cult leaders, the heads of dubious megacorporations, etc. Like dragons in Shadowrun, I think, the powers behind stuff. Cold, cunning, aloof. Potentially smug and superior.
As an admittedly snobbish cosmic horror purist, I feel like actual Lovecraftian beings taking on human form makes such things too similar to the gods of mythology taking on forms to walk about the world, like Odin’s guise of the traveller, or the popular image of the Devil as a man in a fancy suit. I’m not a fan of the idea. These things aren’t meant to be represented by anything familiar, they aren’t meant to be immediate, that’s why Cthulhu only kinda sorta looks like a bunch of different shit mushed together and has dwelt under the ocean for some incomprehensible span of time. It doesn’t really exist like anything in particular we can compare it to. And jamming that into a human form for...what purpose would this serve? They don’t take action in the world, they exist in the far, far background. Yeah there’s Nyarlathotep, who is is famously thousand-formed, but there is no default Nyarlathotep, just a series of different facades people encounter in different times and places. And it always appears in the background even when actively featured in a story. And frankly I wouldn’t even know where to begin talking about the potential personality of Yog-Sothoth wearing a business suit.
Of course I may have just MASSIVELY misread your ask and you mean spooky space gods kinda sorta having humanoid forms, then in that case, I think it needs to be handled carefully but isn’t necessarily a bad thing. I mean, Cthulhu had a generally humanoid outline, but whose to say that’s a humanoid outline? That’s from our perspective. Who’s to say that the outline intelligent life manifests isn’t one head, two arms and two legs? The idea of ‘oh we happen to look like it’ can work and can be made to work to be more sinister.