My favorite is always whichever one I read most recently! That said I am especially fond of Elantris, Hero of Ages, Words of Radiance, and Bands of Mourning.
Favorite characters are Hrathen, Steris, Jasnah, and Kaladin.
Greetings all!
I've been a Sanderson fan since finding Elantris (his only published book at the time) in an airport bookstore. It got me through a long flight home. :-)
Since then, I've gobbled up everything as it gets published, but haven't explored theoryland much...yet. Looking forward to expanding my Sanderson journey!