Attire:
Accessory: Phantom Of The Opera Face Mask [Porcelain, Naturally] Why? Cause it looks epic and mysterious...
Headgear: Nothing
Upper Body: Tight Black T-shirt With Matrix Coat, makes for more dramatic kills.
Lower body: Combat Trousers
Footwear: Steel Capped Combat boots To Kick zombies whilst reloading
Primary Weapon: STG-44 why? cause it is nothing short of an rapid fire rifle, 30 bullet magazine, with the caability to empty its clip in seconds. In short I'd be killin at least 30 zombies before reloading
Secondary: Pair Of Magnum Desert Eagles .44 for my left hand, with the laser guide [cause its my weaker hand] and a .50 cal for my right hand :p
Melee: Hattori Hanzō Samurai Sword. I need say no more.
Stronghold: Castle Wolfenstein, it is perfect. As long as you don't go into the crypt [where there are already undead warriors] you won't have an issue, cause each hall and room is open with no niches and it is so vast by the time you find a zombie it will probably be lost XD, also with various torture chambers, and biological engineering factory inside you can manipulate electricity to form barriers at night for when you sleep. As it is a castle, there is always enough food for a siege [up to 6 months].
Hence why Inventory: Ammunition.
Vehicle: You would live in the castle you wouldn't need a vehicle.
Sidekick: Lt. Ellen Ripley - Clone 8
She is nothing short of epic. Enhanced brain function combat skills, blood which can burn through any material, proficiency with any weapon, such as pulse guns and capable of flying class B Spacecraft. If by some unknown feat a zombie bit her her blood would eat through the zombies flesh stronger than any acid.
Soundtrack: Mein Herz Brennt [my heart burns] cause its dramatic, German and has a symphony orchestra. And it get me in the mood for fighting
Final Boss: The resident Invincible Warlord, Heinrich I. But Unless Zombies suddenly take up occultist activities he will not escape his prison
Oh, and of course my battle cry would be Lerooooooy Jenkins!