Yes, they are. They are a part of fantasy literature heritage. Many modern fantasy works still draw inspiration from old dwarven stories, like in some role - playing games where dwarven characters are based on the traditional concepts from these stories.
One common theme is lost treasures. Dwarven ghosts are often said to guard ancient hordes of gold and jewels that were lost in the depths of their mines. Another theme could be vengeance. Maybe a dwarf was wronged in life and as a ghost, seeks retribution. Also, there might be themes related to unfinished business, like a dwarf who died before completing an important mining project and their ghost lingers to see it through.
Not necessarily. Some dwarf clans might be more superstitious and thus have a greater interest in and prevalence of dwarven ghost stories. For example, clans that have a long history of mining disasters may have more stories as a way to cope with the loss. Other clans that are more focused on trade or diplomacy might not place as much emphasis on these spooky tales.
These stories can also teach us about their relationship with other races. Maybe there are tales of dwarves trading with humans or having disputes with elves. It gives us a sense of how they interacted in the fictional world.
There was this time when I entered an old abandoned house in Skyrim. I expected to find some treasure or a spooky enemy. But instead, there was a group of skeevers (the rat - like creatures) having a little party. They were all huddled around a small piece of cheese and they looked so cute and out of place. It was a very unexpected and funny discovery.
I was in a tavern in Skyrim and decided to challenge a drunk Nord to a drinking contest. I thought my character could handle it. But after a few rounds, my character started staggering around and seeing double. Then he passed out right on the table, and the Nord just laughed his head off. It was a really funny experience.
The Shura Armor was a villain character in Armor Warrior 2. He was an extremely evil existence. His goal was to destroy the Armored Warrior and destroy the balance of the entire universe. In the movie, he used various methods to attack the armored warrior, including using dark energy to create chaos and destroy planets. Therefore, we can conclude that the Shura Armor is a bad person.