I have Morrowind and Oblivion.
I like Morrowinds customization with the fact that there are like 20 equipment slots.
Though Oblivion ran a lot smoother than Morrowind, and didn't over complicate things.
I mean Light/Heavy Armour and Blade/Blunt weapons is enough for me.
Not short blade, long blade, dagger, light armour, medium armour, heavy armour, etc etc...
Half of the time I could stab somebody in the face 20 times and not one would hit.
But the can hit me from 10 feet away standing sideways.