THIS or THAT

Théoden  

Túrin or Tuor? 

Tuor

Rhosgobel rabbits or Wargs?

Wargs

Angband or Utumno? 

Utumno

Dumbledors or The Watcher in the Water?

The Watcher

Dumbledore or Gandalf?

(There IS. a correct answer)

Gandalf   (I can't vote against Sir Ian)

Shadowfax or Nahar?

^ Correct answer

Nahar.

Oromë or Tulkas?  

Tulkas

Entish or Khuzdul?

Entish   

Sindarin or Quenya? 

Sindarin

Bilbo's Farewell Party or The Wedding of Aragorn and Arwen?

Bilbo's party!

Elves' immortality or Hobbits' seven daily meals? 

Immortality  (second breakfast does sound good though)

Eldarion or Thorin Stonehelm?

Oooh that's tough

Eldarion.

Bilbo and Gollum's riddles game, or Legolas and Gimli's kills counting game?

Kills, very funny

Glittering Caves or Wellinghall?

Wellinghall!  

Fangorn Forest or Mirkwood?

Fangorn

Oathbreakers or Dead faces?

Oathbreakers

Glaurung or Smaug?

Glaurung

Morgoth or Ulmo?

Ulmo.

Taniquetil or Orodruin? 

Taniquetil

Anduin or Baranduin?