I liked when going into Vilverin (the ruin opposite the sewers) and finding that note scrawled about one of the bandits going missing and they heard her scratching on the walls. That was pretty cool and added atmosphere, too bad they didn't do this more often and with more surprises.
Yea. They did a good job on the ruin right outside of the tutorial dungeon. The bandits camped there also had a book about vampires, with a cluster of garlic hanging above their tent. Did they know vampires were in there? Or were they just looting a tomb, read this book, and got scared? It was really atmospheric.
The rest were kind of a letdown.
Seriously, every cave had the same "room with a pit" and "stalactite bridge over dry river channel." The Falmer ruins were a little better, except for the enemies and and loot. In Morrowind, Dwemer ruins usually had vampires, bandits, Dwarven ghosts, or a combination. I feel like the Falmer ruins were a weird mix of every enemy, and I can't recall any that had "Falmer Ghosts" or unique loot (like Dwemer coins, cogs, cups, tubes, scrap metal in MW) outside of a few specific quests.