There’s this poll Here, and it might be easier to answer if the links were available for the stories. Thanks to Kelkyag for many of the links, for cleaning up the order, and for commenting. 

• Arisse and Chress: starts with Rock, Hard, Now what?, last update Under a Rock (standalone)
• Kidnappers in “Dragons Next Door”: starts with Backpack Gremlins, ends with The Rescue of Junie. (does not really need to be continued, but there could be followup)
• Bjorn: Uncle and The Uncle’s… Pet?; Arguably at a short-term resolution, could go on (FaeApoc)
• Clarisse: Paint it Blue and Paint Me Blue (Adg)
• Willard: starts with Visiting an Uncle, last update The Uncle re. an Aunt (AF)
• Shahin and Emrys: See the Shahin tag and probably the Addergoole site (Adg)
• Tilden: A is for Antlers (Adg)
• Mikary: Questioned (standalone)
• Abrelle: Shades and Shifting (Adg)
• Packing: Packing (standalone?)

• Cumhai: A couple helping hands, last update After the Night (Adg)
• Space Accountant Accidental Marriage: See the Space Accountant tag (standalone)
• The Cat’s Paw: starts with Cats and Grandmas, latest update The Cat’s Paw (AF)
• B is for Beryl and her Boys: starts with Courting, last public update Beryl and one Specific Boy, last update Inordinary Date (AF)
• Boy Trouble: adjacent to Beryl and her Boys, but the Joseph/Radar conflict is also unresolved (AF)
• Charming: thematically related to Beryl and her Boys, but not explicitly tied in (AF)
• The Powers that Be: part of Willard’s thread (above) (AF)
• Midnight, Summer Solstice (AF)
• How The Family Does Things: starts with Unexpected Guest, last update How the Family Does Things; at a chapter end, Robby’s story may have more chapters, or not (AF)
• Family and Cocoa and/or Warm Visions and Warm Family (AF)

• Heroes: follows Princesses, spinning off of Tell me a Story, etc; see also Wild Card (below) (AF)
• An Argument of Magic (+tangential stories) (AF)
• In the Attic (AF)
• Aetheric Cleansing: spins off of Estate; maybe Engraved Invitation, etc, already follows this? (AF)
• Trash and Treasures (AF)
• Bless the Cat (AF)
• Legacy Cat (AF)
• You’d Better Watch Out (AF)
• Wild Card: Wild Card and The Deck, the Fire, the Art (AF)
• Rumors about the Family (AF)

• The Strength: Starts with Intimately Involved, latest update The Strength, with spinoff/backstory Tragedy – Aunt Pearl (AF)
• I Am No Aunt (AF)
• Fated, continued with both Own the Fate, and Certain Things Remain (to One) (AF)
• King(maker) Cake, etc: starts with King(maker) Cake, last update Answers from Grandpa Joseph (AF)
• The Hazards of Magic (AF)
• Exhaustion (AF)
• Three Glass Beads, Peacock Blue: spins off of Estate, last update Hidden History and Misplaced Beads (AF)
• A Locked Chest is Locked for a Reason and Even a Locked Chest Must be Unlocked; rather finished but there could be consequences? (AF)
• Fifty Years (Reissan, Rin pre-war)
• A Wedding and Rin, related snippets. (Reiassan, R&G)

• Rin’s parents, and Rin’s father, and …: Rin and her Mother, and Knowing Where His Place Is (parallel thread, both with related material) (Reiassan, R&G)
• Discovery (caves): starts with Part Fnarg, last update A Discovery in Depth (Reiassan, steam era)
• Discovery (at sea): starts with Discovery, last update 77 Words of Discovery (Reissan, steam era)
• Linguistic Tricks: and (and various precedents and tangents) (TUn)
• AE is for Ash: AE is for Ash and (tanget, not done yet) (TUn)
• Rodegard — and Esedora: starts with Prince Rodegard Visits the Imperial Capital, last update Prince Rodegard Considers His Situation (TUn)
• Carrying the Spirit (Reiassan, before R&G) (TUn)
• Skill and Dreams (Reiassan)
• The Enemy’s City (Reiassan, R&G era)
• Road Map To…. (Reiassan, steam era) (TUn)

• The Portal Closed: Portal Closed ‘verse tag (standalone)
• Take Me (UF)
• Cleaning House/Observing: start with Preconceptions, last update Observing (UF)
• Change: Change and Range/Transformation/Ursel (UF)
• Far Weston: Far Weston and Far-Gone From the West (UF)
• Where Do Unicorns Come From? (UF)
• The Silver Road (crosses other ‘verse threads) (UF)
• The Unicorn Bride Rebellion: Introduction and the Unicorn Bride Rebellion, Part I (UF)
• Duty (UF)
• Unicorn Strokes: Stroke the Unicorn, Unicorn Strokes, last update Unicorn Truths (UF)

• Unicorn-Chaste: starts with Unicorn Chase, last update Unicorn-Chaste (UF)
• Over the Wall: starts with Over the Wall, last update Self-Hating (DnD)
• Jin/Hostages: starts with Hostage Situation, last public update Released, last update (?) With Relish (DnD)
• Bianna: Introduced in Then and Now (note: stories by this name in two different ‘verses); also in Hands-on-Knowledge and mentioned in Friends Do (DnD)
• Stranded in Winter (Stranded)
• Matchmaker, Matchmaker (Adg)
• About That… (Adg)
• Bracken, her first year, and Continued; also Bracken, her second year (Adg)
• Deaths in the Faerie apocalypse, a side note (Adg)
• They Were Over (Adg)

• Together/Again (Adg)
• Then and Now: Then and Now (note: stories by this name in two different ‘verses); crosses over with Cats and Grandmas, the latest update of which is The Cat’s Paw (AF)
• Romance was never this convenient to handle (standalone)
• Falling From Grace (standalone)
• Someone Let Me Marathon Criminal Minds (fanfic-adjacent, standalone)
• Own the Fate: started at Fated, listed above; see also side story request in the comments (AF)
• Hooked In (AF)
• Love Meme: Kai and Rozen, Autumn and Ink Either or both could take followup (Adg) (Stranded)
• A Storm Brewing Over the Skies of … Setting (standalone)
• The Monarch (standalone)

• Where It All Began – the Zeroth Cohort in Addergoole: Where It All Began (Adg)
• The Princess and the Tallest Tower: Introduction (new, standalone)
• Return to Sender/Old Debts and Old Favors***: No posted text yet, see concept image (unknown ‘verse; might be FaeApoc)
• Catbois in Cages: Catboys in Cages and Continued (FaeApoc, new)

Potentials Suggested But Not On the Poll:

• The Tuesday Map (standalone)
• Cat’s Mystery (AF)
• Eralon Explains
• Stone Soup and Other Gifts
• The Beggars
• Planting some Good

Abbreviations:

Adg: Addergoole
AF: Aunt Family
DnD: Dragons Next Door
R&G: Rin and Girey, the first and longest-running story of Reiassan
TUn: Things Unspoken
UF: Unicorn/Factory

Fae Apoc, Stranded, and Reiassan are their own universes