Nora's my least favorite because she was so weak, always seemed so shocked that they were charging criminals and way too soft on murderers while never really seeming to carry her shock to the crimes they committed or feeling sorry for the victims and their families. If they kept her the way she was in the episode where she ends up choosing the death penalty for the boy who murdered the Chinese delivery man then she would have been more interesting. She was against it personally, she looked through the law books to find a solution, and listened to reports and Jack on the murderer before realizing the murderer did deserve the death penalty. That really was her best episode and made her so interesting. She listened to all the facts and research the law herself before making her decision. Had they done that with her in every episode or most of them. she would have been a great DA and she probably would be higher on my list.
I was happy that Serena was fired. But really she should have been fired at the end of Smoke after defending the parents who let their son be molested for money. Not only is that disgusting and horrifying, that's not someone you want prosecuting child molesters. There were other episodes that made more sense for her to be fired. I don't like her in last episode mostly because she was right for the wrong reasons. After talking to all his friends and family, Serena decided he couldn't have committed the crime based on what they said and how they spoke of him. But so many friends and family do say that when their friend/love one is arrested but that doesn't mean their still not a murderer. But I'm not sure that was a reason for her to be fired.