Some favorites are:
Kaladin, because I can relate alot to his depression and it kinda gives me hope.
Vin, because I like how she grew from pretty much a nervous little kid into a full fledged badass.
Siri, because she never took anybody's rust for long, she was willing to stand up for herself and those she cares for.
Steris, because she is always prepared, and she kinda reminds me of my dad how she makes lists for everything. Plus, she seems like a really loyal and trustworthy person.
Now characters I don't like, I have a feeling a lot of people might disagree with me on these lol:
Dalinar, because I really hate mass murderers no matter how much they atone or change or cry over it. The simple fact is, a TON of people are dead who shouldn't be and it is all his fault.
Hrathen, I immediately hate any character that tries to force their religion on others. It's that sense of "I'm right and I know what is best for everyone else" that I truly despise.
I'm tempted to say coinshot, because being able to fly around like that would be awesome. But I think being a gold ferring would be slightly better for me really just because I have lots of aches and pains and it would be nice to be able to heal those lol.
And yes, I plan on reading Yumi and Sunlit Man after I finish the rest of Mistborn and Tress. Hopefully I can fit all of those in before Wind and Truth comes out (only have a month left so it'll be close).