Just finished watching the episode, so I thought I'd note down some of my first thoughts/ reactions.
10.16: Paint it Black
Oh, oh, my booyssss! *heart clench*
Sam is far from ready to give up on finding a way to help Dean. And Dean, oh Dean.... he's so scared and really not ready to die, but he's so convinced that that's how it's going to end. T__T Sam's not gonna let that happen, of course. Not again.
Talking about Sam... love how he saved the day, ignoring Dean and reading through that journal. And Dean being unable to just say thank you. *smacks him in the back of the head* :')
I'm glad to see that the Crowley/ Rowena story-line made it's way back to the Winchesters. They better watch their backs because she's aiming for the bunker.
All in all, I really liked this episode. It felt a tiny bit choppy at the beginning, but it thankfully evened out towards the end when the different story-lines came together a bit.
:D