Warbreaker is easily my favorite of Brandon Sanderson's books. Like all of Sanderson's work the magic system was unique and the characters were great. What really sold me on Warbeaker though was the character, Lightsong. Probably one of my all time favorite literary characters, Lightsong is a god that doesn't believe in his own divinity. I won't spoil anything more, but Warbreaker is an exciting read and definitely worth picking up.