My favorite character is the doctor--because he is so clearly someone who wishes he didn't give a shit but still does and it tears him up to care about people when all he sees is suffering. But to me, okay, you have a great character like that...now do something with him. Present him with a dilemma, force him to confront his views, force him to change or fail to change, just something. And this show is content for him to just be.

I really like Al's enforcer and I can't justify that at all. How can he be sweet and still gut people in a bar?

I was moderately interested in why Don was an asshole in the first season, but then they answered that, and then...he's still an asshole. PLOT REQUIRES CHANGE, YO. And Joan was my favorite character and then they did horrible things to her and I just did not care enough to watch anymore.