Yes, I definitely enjoyed learning more about the Winchester family history both at the personal level and in the larger scheme of things. The Men of Letters was interesting and I like that they've introduced a new story arc. It was also interesting to get some more information as to why "Heaven" wanted John and Mary together so badly. If Winchesters were Men of Letters and Campbells were the best hunters (apes), then combining those bloodlines would get the best of both bloodlines into one. We will see Sam and Dean as the culmination of this right? That's why they're so good at what they do and why they have to stay together to do the work. Also enjoyed Abadon as a supreme demon. Would like to have seen her and Crowley meet!!!
Bearcata - I agree about Dean's reaction to Henry - pretty darn hypocritical.