There are many plugins for Morrowind. For the character, the NPCs, graphic, etc.

1. The cities in Oblivion aren't much fuller
2. The map is empty (except for the bigger cities)
3. Good graphic with some weak points (very washy LODs, really big HUD and UI)
4. You can alter the face as you wish (hair color, hair length, mouth, nose, eyes, brows, etc.)