Morrowind is a 3d game, but i'm sure you already knew that.
You can do almost everything, the world you play in is realy big, it's possible to get lost. (a lot of npc's)
The are a lot of quests to solve, armour and weapons to find.
It has a nice level up system, for example, if you keep on running, your running skill improve, same with jumping or swimming or slashing with a axe or sword.
Graphics are realy great....
It will take a long time before you have have finnish the main and sub quest's.
Buy it, you won't regret it.
If it does, i will take you out for dinner <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />