Dwarves have always struck me as odd creatures...
Pretty much anywhere they appear, they've got some common traits. They like to live underground. They mine. They make things out of stone and metal. They like booze. They build absolutely ginormous structures underground.
What kind of mindset does all that imply?
It seems like they're almost innately greedy. Like they really enjoy digging up piles of gold and silver and adamantium for no other reason than simply to have the gold and silver and adamantium.
They also seem kind of paranoid. Or fearful. Or insecure. They're always digging into the ground, building gigantic fortresses that should be able to withstand just about anything. You seldom see these fortresses under attack... Yet they're frequently empty or abandoned. Dwarves are often portrayed as a race in decline.
Are the fortresses there for psychological reasons? Are they trying to hold back entropy itself, rather than the goblin hordes?
Maybe they, as a race, are deeply aware of their mortality. They know, at a fundamental level, that the entire species is going extinct. Maybe the best they can manage is to drink away the hours and try to build monuments that will outlive their species.
The bulk of that is actually very in line with Tolkien's description of the dwarves in The Hobbit. The dwarves are all kind of irresponsible dicks to Bilbo who want to win the treasure back from Smaug by any means necessary. When they do get the treasure back, they are unwilling to use any of it to help the humans rebuild despite their aid earlier, and despite the fact that they have a fortress full of treasure and nothing to do with any of it. Thorin gets particularly crazy/paranoid when he finds the Arkenstone, the heart of the Lonely Mountain, and is convinced everyone is going to take his birthright. This dickery brings them to the verge of war with the humans and the elves, and to the brink of self-destruction, before everybody's racism towards the goblins saves the day.
And its not just the dwarves who were with Bilbo either; there's the infamous Mines of Moria, an entire prosperous nation that "dug too deep, and too greedily" of which I need not elaborate further. And lets not forget Thrain, Thorin's Father, King under the Lonely Mountain, whose quest for wealth made his fortress famous, rich, and ultimately attracted the attention of Smaug. And then there was Dain, Thorin's cousin or whatever who was leading a relief army to the Lonely Mountain to help secure it against the humans and elves...
Pretty much every dwarf in the Hobbit is greedy, gluttonous, and the entire history of the dwarven people is a story of short dudes who were good at finding nice stuff in dirt but were eventually undone by it.
Also, Dwarves as Nihilists are a terrifying concept. I could just see a human wandering Undergrotto or Boatmurdered, finding these fantastic treasures and statues until they come to a giant statue of a dwarf, hollow, empty, with the inscription "I am Urist, King of Kings. Look on my works, ye mighty, and despair." Not a soul remains...