agree with both of you about Hrathen.
Mistborn trilogy: Elend
Warbreaker: I'm going to differ from you and say Vivenna, I'm not sure why, something about her plotline and chharacter development just intrigues me. Lightsong is a close second..
Alloy of Law: Marasi because I identify with her, though again the comic relief is a close second
Way of Kings: Kaladin if the Interludes don't count, Axies the Collector if they do, because Axies the Collector was hilarious.
edit: darn typos.