This guy fucks

Learning that Geralt is the most powerful witcher alive while watching him scrub a floor was amazing

I think the reason Geralt was so strong is that his mother was a sorceress. They meet in the second book and she saves his life and is said to look even younger than him. The whole "sorceresses should not have children" thing was something Tissaya de Vrie created (Yennefer's mentor). But in reality there are many magic users and sorcerers who can have children. So Geralt being extremely resiliant and strong could be genetic. Also his father was a mercenary and adventurer, so he also wasn't a regular man.

"It has been widely theorized by many many fans that CDPR actually based this speech on medieval Georgian languages" As a Georgian I can tell you it's not medieval, but simply current everyday Georgian lmao. When I was playing the game I got freaked out because somehow this devil person talked to me in my own language. You can imagine just how much of a 4th wall break that was and therefore that much scarier.

The idea that Coral is pretending to be Triss falls apart after you add Yen to equation - jealous, vindictive and pretty powerful sorceress who would surely see through the charade of Coral trying to behave and look like her best friend to seduce her man

O'Dimm was one of the only characters that I was genuinely scared of

one thing that I thought was interesting that i havent seen anyone talk about was during the beginning of the game when Geralt and vesemir reach the bar,  the cutscene involves a table of men and one of them tells the waitress that the temirian flag should be taken down which angers another man who thinks that flag has a right the be hung. as the man gets mad the camera shifts to behind gunther o dim and then the man who was enraged grabs his head in pain almost like Guther o dim was the one causeing his headace to ease the atmosphere for Geralt to enter the bar. if you rewatch the scene you can see what i am talking about.

Minor detail: At the very end of the DLC, O'Dimm doesn't speak a form of elder speech.

He speaks three different real world languages:
'You're a rooster and the rooster is king only atop his pile of manure.' (Creole French), 'You think you've won. No, you are wrong.' (Georgian), and 'I can't die. I'm going now, but I'll be back.' (Ossetian)

I was wrong! DELETED

Originally, in Polish, the name of the horse doesn't stand for the "fish" but type of common fish in our country. Płotka is rutilius roach :)

I remember playing throughout Blood and Wine and meeting that one elder vampire. When I accidentally asked two questions, the moment he killed Geralt with one hit, I just had to ask myself just how many more creatures are out there that are just as scary and powerful as this elder vampire and just how big the world can be, that Geralt may be one of the most powerful warriors of the continent, but he ain't the most powerful. Not even close.

No, Roaches name doesn't come from the word "fish", because the Polish name is Płotka. Roach is the literal translation of the word płotka, which is a kind of fish. Płotka is also feminine, almost every word ending with an 'a' is feminine in Polish. And the theory about Roach is pretty weird. Roach is just a normal horse and he's talking in that quest, because Geralt is hallucinating.

Roach theory is pretty absurd.
1. It is well stated in the books that Geralt gives this name to every one of his horses. There is even one dialogue in "Witcher 3" confirming that. There is no other way, especially taking long lifespan of a witcher into account.
2. "Płotka" is not polish word for fish (that would be "ryba"). "Płotka" is a polish word for particular species of fish, which translates into English as... Well... "Roach". :) Also in Polish this word has a second common meaning - it can be used to describe something small or insignificant, like low level member of an organization. There are elements of "Witcher" lore that are extremely hard to translate or require some knowledge of Polish socio-cultural context to understand.
3. Geralt would have noticed that his current horse has some strange teleportation powers. What we witness here is just another example of ludonarrative disonance. This is common in video games. Sometimes we need to simplify narration to make game more enjoyable, but it leads to paradoxes. My favorite example: protagonist of "Watchdogs" lamenting over one guy who have died because of his actions, after during the game play he killed hundreds of opponents.
Yes - developers could have implemented mechanism requiring you to retrieve Płotka from the stable you left her. But that would kill fun. So it is assumed your horse just travels with you and is always around. The same can be said about chest, where Geralt stores his equipment. This is extremely weird that in every chest, everywhere we have exactly the same set of items. But it would be frustrating if you had to remember where you left some sword you currently need.

And about Shrek theory: "Witcher" books predate first "Shrek" movie by over a decade. Friendship between Jaskier (in games translated as Dandelion) and Geralt had been introduced pretty early in the books - in the original short stories. Both works simply use the same trope - friendship between men who are polar opposites: a grumpy warrior/loner and slightly silly artist who talks much.

The arch-villain of the Stephen King multiverse, Randall Flagg, is referred to as Walter O'Dimm in the Gunslinger.  He has a very similar demeanor to Gaunter O'Dimm and I believe Gaunter is an homage to the man in black.

Yennifer's and Geralt's fates are intertwined, the book series' ending confirms it and it's beautiful.

As to the theory that Geralt wished for him to have a child with Yennifer. First, I love it. But second, since it's a djinn, the wish got twisted and they ended up with Ciri

1:46 Hi, horse girl here.
A "steed" is not a male horse. A steed is just a horse that is used for riding, used the same as "mount." A male horse would be a stallion or a gelding. Thanks for coming to my Ted Talk.

Final comment: regarding the book 'She Who Knows' in the game about the Crones, a number of other YouTubers have speculated that the story in it is heavily-embellished propaganda. After the Battle of Kaer Morhen when Geralt goes with Ciri to Bald Mountain in Velen to confront Imlerith during the Crones' "Sabbath," when they approach the hill she remarks that the site used to be a hallowed ground for druids, "then the Crones came and twisted the tree." The Ghost/Lady in the Tree mentions Geralt when he goes to kill her, that she "abandoned her circle, where she'd kept the balance." The three Crones are also said to be of various ages, with the Whispess being the "oldest," the Brewess being the middle, and the Weavess being the "youngest." There is also a location in Toussaint where if you hover over the marker on the map, it mentions the Whispess used to live there before. Finally if Geralt chooses to help the Lady/Ghost in the Tree and gets her bones, he remarks that they don't look human. This all points to a likely possibility that she was either a super powerful being from another world or more likely, that she and the Crones were all once regular humans who used magic and alchemy to keep themselves alive and/or more powerful which resulted in them mutating. The fact that the Crones look like young maidens in their tapestry and can make themselves look like that by feeding on the blood of children to maintain that form, may mean that this used to be their original appearance but the magic they worked to become powerful and stay alive came at the cost of their humanity and youth, similar to but also very distinct from how it is with Witchers when they go through the trials. The Crones may have just been her apprentices, all four of them dabbled too far in the dark arts and overthrew the original druid circle with power getting to their heads, then they likely overthrew her and seized power for themselves. Given also that the Crones work for the Wild Hunt as informants and that the Wild Hunt has advancements far enough beyond anything in the Witcher's world, it's also possible the Crones and their "mother" betrayed the other druids in exchange for power and resources offered by the Aen Elle and Wild Hunt.

The Coral as Triss theory is pretty interesting. If I had to venture a guess, maybe they wanted to have a hat-tip to the character in-game but she was dead so they gave Triss some of her characteristics? I do know they changed certain things from the books regarding various characters.

On the idea of The Witcher world being on the verge of a renaissance, you're not far off.

There are some tales of the Witcher that take place after a second Conjunction, where a new school of Witchers were established, called the School of the Crane. These Witchers are specialized not only in swordplay, but also guns as well, likely flintlocks. Whether these are canon or not, only the author knows.

But it is entirely possibly we can get a more modernized setting of a new Witcher game later on down the line.