Long time filthy casual who dabbles in some sweatier formats like Legacy and cEDH, I mostly brew Commander decks that range from Casual to High Power.

Of particular interest is my pod of Legends Beaters, decks built around some of those Legends creatures you look at and wonder how they ever got famous enough to be a Legendary Creature! Wonder no more how they achieved such lofty status in a world where Royal Assassin was kicking around, because achieve it they clearly did! These decks are meant to explore that space a bit, as well as dabble in an alternate Dominaria, so many of the Role Play elements of those decks don't necessarily fit the Magic canon, nor are they entirely serious (as should be apparent).

Pavel the Mighty, Hero We Deserve Rakdos Chaos Control (radical egalitarian, carnival strong man, and rock musician out to improve the world through chaos)
Tobias Andrion, Political Mastermind Azorius Political Weenies (think leader of the Dominarian equivalent of the CIA, only he's a long distance telepath that invents mechs)
Riven, Savior of the People Dimir Interactive Combo (often Archenemy, this cutthroat for Casual deck uses combos. Riven uses populism and unrest to recruit people into organized crime)
Falconer of the Forbidden Way Gruul Eldrazi (ridiculous average MV beaters deck, the old 'downtrodden trod up' story, only with WAY more tentacles)
The Legend of Green Eyes (Lord Magnus) Selesnya Tokens/Anthems (charismatic Druid fighting to protect nature, nouns follow him anywhere, the pod's 'good guy')
Ruby Don't Take Your Minor Demons To Town 5 Colour Legendary Value Pile (official Archenemy deck for the pod, designed to out-value a whole pod and recover quickly from wipes)

Each of these is designed to generate fun and memorable games, with all of them eschewing things that are overly fast or powerful. They are all designed to do things their colour pair excels at. Interestingly enough, the better decks are usually able to hold their own in general metas, but I think it's safe to say that piloting them requires more skill than an average deck if you want win regularly. Over time I'll probably add more storyline to them, and/or clean up what's there already.

Another couple recent decks I'm very fond of that could probably be played vs a wide range of decks:

Staxdrop! (Snowdrop Vorthos Deck) This is my Snowdrop deck, it's designed to be played vs relatively powerful decks, probably 6-8 power level, below that it's too oppressive potentially.

Blood for the Bloodbraid! This is my Kresh deck, Kresh is an old Commander that came out during my really long hiatus from Magic, so I never got to play with him when he was 'fresh'. As is it can get out of hand, and since I've added some more spice to the deck it is very able to pull off explosive wins, this deck no longer has to win via attacks. I feel like it's probably getting too spicy for 6s, and might be able to hang with 8s more effectively.

For the metas where you have no idea what to expect I built Madam Sisay's Illustrious House of Fine Shrining, a deck that's not quite fast enough for upper tier cEDH, but can play with 2nd or 3rd tier cEDH lists, and obviously is fine in High Power games, and since you can fetch out things like Shrines and Progenitus you can also play vs way weaker decks. This is a deck about discretion, as one would expect from a House of Fine Shrining!

My cEDH deck is Zur cEDH (Proxies), this is the proxy version, but I technically have the paper for Salt Miner (Rule of Law cEDH), my OG cEDH deck. The deck is complete homebrew, so keep that in mind if you take inspiration from it, but if you can keep other people from winning early it is a shockingly oppressive deck. Salt Miner is a fairly strong High Power deck as well fwiw, Rule of Law also does a lot of work in High Power, if not quite as much as cEDH.

I have tons of other decks, some of which have been kept up to date. If out of date most aren't wildly so, and I've found that it usually doesn't matter in practice if you don't run the 'best' of something and the 2nd best isn't 'way worse'.