Regular Oblivion:
Weapons: custom enchanted daedric shortsword & bow. Whatever arrows I find when I don't have Amber ones.
Attire:
Leather boots or Boots of Bloody bounding.
Greaves of Purity (glass)
Savior's Hide
Elven gauntlets (enchanted with sigil stone, usually resist magicka)
Spelldrinker amulet
Mundane Ring
Sorcerer's Ring
Mirror Shield or Shield of Mirrors
Black hood or cowl (depending on the occasion
).
Of course after coming out of SI, my character looks like a real nutcase with the Duke of Mania's crown on his head.
Modded Oblivion: have a look at my sig.