The storyline in Morrowind is great, but it is told in an unusual way. At the surface it's a fairly traditional Chosen One story about killing the Big Bad, but

The storyline in Morrowind is great, but it is told in an unusual way. At the surface it's a fairly traditional Chosen One story about killing the Big Bad, but if you dig a little deeper, listen to the various NPCs, and read the various in-game books of historical poetry, it's very morally ambiguous, and not even the facts are completely clear. And some aspects of the story implies that the Morrowind universe does not even have the notion of objective truth (look up CHIM for a rabbit hole, and the maybe-serious theory that one of the demigods in the universe literally got his hands on the Morrowind plugin editor). Also, the game play is very old-fashioned by modern standards.