I think they are all great, but I probably have failed my Saving Throw vs Bias (I'm a freelancer on Dark Eras 2, Kith & Kin, and Mummy 2e). Some highlights:A New Zealand setting, too. I think I'm in. The additional core books are interesting to me too, I only have Mage, Changeling, Geist, and the CoD cores at this point, I think, and some Dark Era stuff via Geist KS. Demon looks super cool, how are the others?
- Werewolf doesn't get the same love as Vampire, Mage, and Changeling, but I am hard pressed to find a better Second Edition game. It is super, super tight and there are lovely, awful things you can do by combining the dark anamism of spirits with Contagion.
- Promethean is that game that got me into CofD back when it was nWoD. It is personal, dark, and yet so hopefully about how humanity is worth it.
- Mummy... well Mummy 2e obviously isn't out yet, but I loved 1e for how it upended nWoD's conventions. It is another darkly personal game that is all about understanding who you are. Crosses really well with Geist and has an entire Dark Era crossover with Mage in the Dark Eras Companion.
- Your instincts are correct about Demon. If you do pick it up, I'd also suggest grabbing Heirs to Hell, which is all about their semi-mortal children and adds a very interesting new layer to the game while being a small and cheap supplement.