As far as I see it you\'ve got 4 main types of armour Leather, Chain mail, Plate armour and Special Anti-magic Armour (Sorry 5, Mixtures). With several different types under each.
Different Armour segments could be.
Footwear: Boots, Shoes etc
Leg Protection: Leather, Plate armour components
Body Under Armour: Arming Doublets etc
Body Main Armour: Jackets, Chain Mail, Breast Plate etc
Headgear: Helmets, Coifs etc
Hand Protection: Gloves, Gauntlets etc
Other Stuff: Belts, Cloaks
Magic Stuff (Not Really Armour but acts like it): Rings, Amulets, Potions, Spells
Each type of armour could have its own advantages and disadvantages over other types. Also you can wear any armour if it fits your race but as you become skilled in its use the disadvantages become less.
Well thats what I think anyway, Anybody else got ideas?