Your Ideal RPG Series or Campaign

Sky island swashbuckler. Set on a floating archipelago where people travel by airship, the party are each given a classic swashbuckler motive and set to adventure.

I don't care specifics or ruleset. I just want the heroes to throw a villain over the edge and let him fall a thousand feet into the ocean.

some concept I'd love to GM, but there is not enough time a week.

• A Vampire the requiem campaign with PC part of the Cartian movement from the french revolution to let's say the fall of the Berlin Wall. And would follow revolution hero turning into dictator and all the alternating Dictatorship-->Revolution-->Republic --> Dictatorship that lasted for the next 150 years at least.
• A Kult campaign based on the backroom creepy pasta. No spoiler, but I can really see how to intricate Kult lore in that one.
• I am sure there is a way to turn the Steampunk Musical The doll of New albion where Anabel is raising up the dead into a great steampunk campaign, but not sure where to start, so it's lower on my priority list.
• A Fading suns campaign where the players plays symbiot, this one is on my bucket list since War in the heaven came out. However, it requires players knowing the lore and ready for some spoilers, so kinda hard to put in place.

A modern day police procedural, likely using either CORPS (if I want crunch) or FATE (if I want drama). Think something like Law & Order without the fascist apologia (but WITH Jerry Orbach!) expanded a bit to include peripheral characters including the criminals, the families of both sides, etc.

And then the world ends.

Well, not quite ends, but there's a rather sudden drop in the standard of living as the half of the world facing the sun gets burned to a crisp, in effect, while the ensuing massive wave of fire and plasma scorches most of what is left. Only very small portions of the world survive (and that only barely). Nobody IC will know how or why it happened (I naturally will—it's one of the scenarios taken from CORPS Apocalypse) but when it does, the characters will have to face living in a world where most of humanity is dead, the trappings of civilization are gone (most important of those being the supply chains that keep cities alive!) and all that's left are the buildings and a rapidly-dwindling supply of essentials.

I tried doing this once when some players were saying they wanted a campaign that would surprise them. And surprise them it did, but apparently this was not the kind of surprise they were looking for. I want to try it again with players who will be strongly warned in advance that the campaign will go completely off the rails and change genre after a few sessions of play establishes their characters, their personalities, their relationships, etc.

System: Fate

Concept: "What if we fix the world with violence?". Sort of the non-sephiroth parts of FF7. Near future cyberpunk ecoterrorism. The villains have money and the power that brings, but they're still mortal. Find when their board meeting is happening, set off a bomb in the office. Find where the CEO gets lunch, shoot him in the back of the head. Senator voting to defund public education? Wow what are the odds he'd drown in his bathtub?

I did sort of get a game of this going for a while, but the players ended up being a little weaker than I wanted, and the "make allies with other people who hate your enemies" was slow to catch on.

I also probably let too many tangents sprawl out.

One of them also rolled well below average, based on analysis one of the players did of the dice bot.

I'm running mine. I'm playing Pokemon Tabletop United with my friends. Going for Pokemon Ranger and Mystery Dungeon vibes, but in an industrial revolution time period, with the main quest being a One Piece-style journey to the other end of the world, to conquer the unknown Wilds and meet the gods. As my players Trek through the wilderness, they'll have the opportunity to impress the gods, earn their favor, and compete against other Explorers to be the first to reach the End of the World