Crowley is being creepy and I'm loving it! And I'm so excited to see Dean as a demon.

Swan Song would have been a great finale, if not for the last ten seconds or so. Sam coming back at the end makes it probably one of the worst, for me.

In fact, I like to think of the last four years as a bad hell-dream, and the series really ended with Sam in the pit with Lucifer and Michael and Adam, and Dean living miserably ever after knowing he helped send his brother to Hell :)