Dragons... it was always going to come to dragons...
I’ve written a bit about the great beasts before, and as with humanoids there are countless varieties already written up. My favorite is not so much a type or color of dragon, but rather individual dragons.
A red dragon can be scary. Smaug terrifies everyone, and drives dwarves to do crazy things.
Skeletal dragons are kinda creepy. Kaladrax (and Hyrelka) have a story.
The difference is that one has character, while the other doesn’t. Any dragon can and should be a tough fight. But the dragon who has demanded a virgin sacrifice every year for a century, as well as the revenue from a trade route and the heads (and magic items) of any adventurers who pass the area… that’s something much different.
It’s the difference between a dragon sitting on a type H (or even Hx2) treasure, and one sitting on the wealth of an entire dwarven city, complete with the fabled arkenstone!
Is that ‘just’ a green dragon flying overhead? Or is it Viridius, the keeper of the ruins of the fabled elven city of Quessallas? Is the rotting dragon corpse a zombie, or Nethyrmaul the Undying?
Even Flit is a more interesting encounter than a juvenile fire dragon.
My favorite dragon is one with character.