Favorite Cities in Eberron?

I've spent the last six weeks traveling the US in a van to demo my card game Illimat, and that's meant that I haven't had much time for writing. I have three big articles I'm working on for the website, but they're complicated topics and need more time. But rather than leave you all hanging, I wanted to pull out an easy question from the ones submitted by my Patreon supporters... and while I'm at it, thanks to everyone who has chosen to support me and this site! Now on to the question:

If you had the chance to to another Eberrron city book on the scale of Sharn or Stormreach, which city would be your first pick and why?

My first choice would definitely be Graywall. This is the second largest city in Droaam, lying directly on the border between Droaam and Breland. Why Graywall? Here's a few reasons...

• Like Stormreach, Graywall is a frontier -- a gateway to a world the people of the Five Nations know little about.
• Droaam is a nation of monsters. Humans are in the minority here, and that creates a lot of potential for interesting stories that don't work in many other places. It's a chance for player characters to interact with "monsters" as something other than enemies - to deal with medusas, harpies and werewolves in ways they wouldn't anywhere else.
• It's a city filled with intrigue and opportunities. Droaam has only been a nation for a decade. Many of the warlords have their own agendas, and there are those who which to bring down warlords to take their places. Beyond this you have the mysterious schemes of the Daughters of Sora Kell. As it's not bound by the laws of Thronehold, you have opportunities for war criminals, outlaws, or wizards engaging in arcane research forbidden in other places. Beyond this, it's built atop ancient Dhakaani ruins... yet one more thing to explore.
• Beyond the city itself, such a sourcebook would be an opportunity to explore the many cultures of Droaam in more depth. Droaam is a tapestry woven from many distinct and very different cultures: the doppelgangers of Lost, the tieflings of the Venomous Demesne, the lycanthropes of the Dark Pack, the gnolls of the Znir Pact, etc, etc. I'd love to be able to delve into each of these more deeply, creating hooks that are equally useful for DMs building stories and players who want to play a member of that culture.

Graywall is a chance to take something very different and distinctly part of Eberron and to tell stories that you couldn't tell in any city in the Five Nations.

So: that's my first choice. But there's lots of other possibilities.

• Thaliost. This Aundairian city was seized by Thrane during the Last War. The Last War never really ended in Thaliost, and it's a great place to explore the lingering tensions and ongoing intrigues between these two nations.
• Atur. The City of Night is the heart of the Blood of Vol in Karrnath and the center of their necromantic research. It grew in power and influence along with the Blood of Vol, but now that Kaius has abandoned the faith it is a city in crisis - an a place filled with opportunity, adventure, and a chance to consider how necromancy could be integrated into society.
• Rukhaan Draal. The capital city of Darguun intrigues me for many of the same reasons as Graywall -- an opportunity to explore adventures in the city of those usually considered monsters in other settings. It's also an opportunity to dig deeper into the customs of both the Ghaal'dar and Dhakaani goblins.

Taer Valaestas in Valenar. Pylas Talaer in Aerenal. Almost any city in the Lhazaar Principalities... like most of those described above, it's the chance both to flesh out a city as a hub for adventure, but also to delve deeper into the cultures that shape it.

To be clear: This isn't necessarily one of the first sourcebooks I'd make if I had the power to do so. I'd rather write a sourcebook on Darguun than specifically one on Rukhaan Draal, and I'd pick a Droaam sourcebook over a Graywall sourcebook -- because there's so much to delve into about those entire regions. And I might write a book on the Planes before that. This is a thought experiment -- if someone appeared tomorrow and said "You can write an Eberron book, but it has to be a city sourcebook" what would I want it to be?

Anyhow, that's all I have time for today. What cities would you like to see developed in more depth?