For rom hacks, I have some in progress. Here is what I have started:
Pokémon Odyssey, which finished this year. I don't know anything about its inspirations, but I like the plot so far and the Etrian forms
Pokemon Vega, a fan hack made by Japanese devs, which seems to be rare
Pokémon Grape, an extensive Gen 1 rom hack that seems to be more puzzle-focused (and is also harder to find these days)
The Pit, which is basically TTYD's pit of 100 trials if it were Pokémon
Quarantine Crystal, which is Pokémon Crystal with all Fakemon and altered maps, particularly Kanto
Pokescape, which is based on Runescape. I also know nothing about that, but it's still fun without that knowledge
Explorers of Alpha, which is an "enhancement" mod of PMD EoS but with a lot more features than a standard mainline enhancement hack
Recordkeepers, a rougelite hack that changes up battle mechanics in a unique way (but it is kind of lacking visually)
Pokémon Pisces, which is Hoenn (specifically Gen 3) set 20 years in the future
And some other ones I haven't started/playing a second time:
Fool's Gold
Brown (2014)
Aqua (mysterious hack with no documentation)