Well so far I have only read Elantris, the first Mistborn Trilogy, and I'm halfway through Oathbringer, the 3rd book in the Stormlight Saga but out of those 6 and a half books I think Words of Radiance is my favorite overall thus far with Hero of Ages a close second. And least favorite character? Man, that's hard to say. Saddeus and his wife are definitely a possibility. As is Meridas Amaram.