This list is far from definitive. Jess treated Rory terribly minus the few episodes he guest starred in in later seasons. If chemistry buys you higher up on the list then Christopher deserves the top 3.
Response to 25 Ways “Dexter” Went Wrong:
I LOVED the Hannah McKay story lines. My issues are more with what the writers failed to do, rather than what they did wrong. What about Harrison having a “kill gene”? What about Batista discovering what Dexter really is? To me all this article does is bash every single one of Deb’s relationships. Geesh.