The mystery of the Dwemer is one of my favorite aspects of TES. I wish there was some tiny hint as to what happened to them, or how they lived, or something like that. The addition of a certain type of Dwemer devices/structure was good enough for me though. As long as we keep getting tid bits on their lives, the mystery will stay fresh and interesting.
I totally agree with you. The Dwemer mystery is very profound and now that I found out the Falmer where actually once Snow Elves and trusted the Dwemer, I'm even more intrigued. During a quest, I had to make a copy of some Falmer research and the guy said, I have a book about the Falmer history on my desk - I immediately had to pause everything I was doing to read the book! lol I like how they actually build in a bit more lore about the Falmer in Skyrim!
And the sounds in those ruins... I love it!
The Elevator is waiting... http://img193.imageshack.us/img193/4369/elevatoriswaiting.jpg