every single dungeon or place in this game has its backstory, it doesn't need to be always something that an NPC says, there's books to read, notes you find in dungeons and journals that explain what's happening, sometimes it's only visuals, like a dead necromancer surrounded by skeletons (maybe something gone wrong for him?).
i call this fun, as well as interesting and mindblowing sometimes.
Up to you.
A lot of players like progression elements and gameplay rewards and do not care about backstory or books or lore or whatever floats your boat. This is a game after all and it is quite easy to implement a progression system that would provide more "fun" for players. Repetition is not always a bad thing. There are a ton of FPS games that people play the same map with the same guns in it. The content however is constantly changing, particularly in PVP environments. Granted this is a single-player so you have to change how that dynamic content works. Itemization, character progression, and challenge. Those are the 3 key elements to creating a success RPG from a gameplay aspect. Then you have the lore, storyline narrative, environment, and immersion qualities on the other side of the coin. A game with only one side or when one side is done poorly is a shame, especially when Skyrim COULD be nearly flawless, it has lots of potential but isn't quite there.