Reasons why Theoden is my favourite LOTR film character:
1. His voice - Clear, commanding and inspiring. I wanted to charge into battle with him.
2. Grace under pressure - "When last I looked, Théoden, not Aragorn, was king of Rohan." While Aragorn was a key focal point, if you think about it, he was not king of anything yet so if he failed, while all would be lost, he would just fade into obscurity. Meanwhile, Theoden had his forefathers to live up to and his people to inspire...and inspire he did.
3. The beard - Seriously, have you ever seen such a perfectly coiffed and full goatee. It should have been a character onto itself.
4. His armour - Purely my opinion but it was totally boss. Haldir's battle elves were a close second.
5. His dialogue - 'So much death. What can men do against such reckless hate?' I separate this from his actual voice/ability to deliver. His lines/monologues/speeches were IMO the most moving of the films.
Some good points. Especially the beard, in a world full of facial hair his was some of the most kingly.