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The Adventures of Spider Jack in the Cotton Candy Forest
Halloween is just around the corner. Children are telling stories of Spider Jack, the man who lives in the woods and decorates the trees with cotton candy. They are fun stories, until kids begin going missing. Join us for some wicked fun, and uncover the mystery of Spider Jack.
http://housedok.com/spider-jack/
Patrons get access to bonus content like, more on Elder Speech, an alternative to fighting Spider Jack, and new options for defeating him. Also, ways to cure Jacklings.
Patreon: https://www.patreon.com/Metahumans

This one is a lot more than a seed. We put together a mini-setting and repeatable adventure, it's available for free at DTRPG. 
 
https://www.drivethrurpg.com/product/315092/The-Burning-Earth-Arena?src=hottest_filtered
 
The Burning Earth: Arena - A Metahumans Rising Other Worlds Setting & Adventure
This micro-setting and adventure inspired by movies such as Death Race 2000, The Running Man, the Hunger Games books and movies, and comics such as 2000AD and Battle Angel Alita. Set in a post apocalyptic wasteland that pits Champions against one another in a series of blood sports where they hunt down lawless Exiles who live beyond the rule of Those Above. 

Designed for Metahumans Rising, the setting forgoes the traditional superpowers for a gritty world of suffering and survival. The Burning Earth: Arena does not use the traditional character creation system. Instead, players use a life path to determine their Attributes, Talents, Boons, Fighting Style, and Gear. The Life Path generates characters on par with a Low Powered Hero. GMs may allow players to create traditional Low Powered characters.
Includes  Burning Earth setting with six unique regions  New Life Path character creation method designed for the Burning Earth  Three sample Arenas each with their own unique complications A host of new threats and antagonists for use with the Burning Earth setting, but 100% compatable with the core Metahumans Rising game. Everything from Road gangs to gentically engineered monsters. 

Going to use this thread to post updates whenever there is a new Adventure Seed or one page story released for Metahumans Rising. 

Discovery: Pissing off people who don't think Star Trek should "go woke", thus showing they didn't pay attention to the original series.

Discovery: Pissing off people who don't think Star Trek should "go woke", thus showing they didn't pay attention to the original series.

The Original Series: Adventure
The Animated Series: I watched as a child but don't remember well enough to comment
The Next Generation: Hopeful vision of the future
Deep Space 9: Ongoing story lines and moral complexity
Voyager: Didn't watch
Enterprise: Didn't watch
Discovery: Diversity and handling of emotional trauma
Picard: Nostalgia 
Lower Decks: Humor while remaining Star Trek
Prodigy: This one has lots of potential. It is extremely the cool that the entire crew is aliens.  However, it trying to attract a younger audience it dumbs itself down somewhat.  Kids are smart and that is unnecessary.
Strange New Worlds: SNW does so many things well that is hard to pick one to settle on.  Probably the best of the new Treks.

I did not like the Animated series as it was done by the same outfit that did Lassie's Rescue Rangers so it had the same music cues. It also had the alien with the odd neck which meant it could have been snapped so easily.
 
The Original Series introduced us to the Star Trek Universe. The ships, the uniforms and everything built from that. Without it you can't have the others. And it is the Captain doing most of the work. Something you don't realise until Next Generation.
Next Gen gave us a captain and crew where the crew did the work as well as the captain.
DS9. This gave a fixed location around which the stories revolved and different aliens to explore. Cardassians, Bajorans, Ferengi and the shape shifters. There was also the major religious element to the Bajoran culture. This has a long arc of a fixed enemy which the other Trek before it did not. Whether it was the Cardassians or Klingons or Dominion.
Voyager. Lost in Space lasting more than three seasons. The crew that did not really click. At least with me, 
Enterprise. It had Scott Bakula. Instant turn off the TV or change channel. Never saw enough to form a definitive opinion.
Discovery: Only seen the first season. Would like to see more. Different take on the established canon.
 
I have not seen Picard, Lower Decks, Prodigy or Strange New Worlds. 

I haven't seen all the series, so I can't speak to those I haven't. Also, the initial question was to elicit opinions about what each series did "best," not necessarily exclusively. So the opinions I express are on that basis.
 
TOS was the best of the series as adventure: going to new places and discovering new things, then dealing with the challenges and threats those discoveries brought. The animated version was essentially more of the same, but with the more trans-realistic visuals possible with animation versus live action in that era.
 
TNG was the best at exploring the nature of "humanity" (not just human beings). What we want, what we value, what we believe in, and how those things often conflict and can be hard to reconcile. But the overall tone was optimistic, that human society as a whole had grown up and that ideals and principles would ultimately win out.
 
DS9 stands out as deconstructing that optimism. It excelled at showing that human society was not as ideal as it appeared on the surface, that its principles didn't always stand up to the challenges it faced, and that under enough external pressure the dark underbelly of human nature would show itself again. While so much of ST had been black and white, DS9 explored the gray.
 
Voyager was the story of castaways, a group of diverse people stranded together far from home, having to learn to trust and rely on each other to survive. It's at its best when it focuses on the story of strangers having to learn to become family.
 
The best of Enterprise arose out of exploring how the universe we were introduced to in TOS came to be. How the human race began pulling itself out of the mud it made, and reached for the stars. How the discovery of new things and people forced us to reevaluate ourselves, and broaden our understanding of our place in the greater galaxy. IMO it was a tragedy that that direction was just gaining steam when the series was cancelled.
 
Picard the series tries to springboard from the deconstruction we first saw in DS9. It depicted what the Federation had stood for as having been a lie, what its protagonists fought for as having failed. IMO it didn't do that very well, because it focused on flashy action and fancy visuals, and on nostalgia and sentimentality, versus genuine character growth and the implications of that societal change.
 
I haven't seen the other series mentioned.

Alright, full answers: 

The Original Series: Set the foundations where humanity had transcended it's old isms, except for Klingons, f' those guys apparently.  
The Animated Series: Let's get weird, giant Spoke, cat people, the devil, random other gods, check, check, and check. 
The Next Generation: The realization of the concept, even if the studio wouldn't let Frakes kiss a dude and struggled with some of the writing... shut up Wesley.   
Deep Space 9: Casablanca... in Space....
Voyager: The Odyssey... in Space... also, good for Howling Mad Barkley. 
Enterprise: How you know you've got to many continuity errors? Computer end program. 
Discovery: 
 
Picard: <Sadly, haven't started watching it yet.>
Lower Decks: Oh yeah Seth, we can be funny too! Also, Easter eggs, the series, and I'm here for it. 
Prodigy: Solid intro for kids into the franchise. The second half of the season was much stronger, but many Treks struggled in their first season. 
Strange New Worlds: We've got 10 years of Pike, no time skipsies, give me 9 more seasons of that please. 

Discovery: Pissing off people who don't think Star Trek should "go woke", thus showing they didn't pay attention to the original series.

Discovery: Pissing off people who don't think Star Trek should "go woke", thus showing they didn't pay attention to the original series.

No lie, at least three of my high school friends said they were going to be marine biologists. Always wondered why. 
 

While clearly not the best episodes,I'd like to take a moment to acknowledge any episode with  Howling Mad Barclay. I have this theory that you can take almost any Wesley Crusher episode and give it to Barclay and it gets better. Also, I trust, this cat knew how to "utilize" the holodeck. 😈
 

Honestly, that was what I was expecting to find when I started looking.  "Butts."    Feh.  We have an entire Butts County.  Our favorite meat for barbecue is Boston butts.
 
Our lives revolve around butts.  It's actually pretty awesome.