I was going to put Gwen hugging Crowley on my list of things I hated in the comments, but you got to it in the questions. (I REALLY hate that. Second only to Charlie telling Dean thanks for saving the world and telling Sam sorry about his bad luck with ladies.)

I think Mick is Frodo because he's British and lives in a hole in the ground and thinks that Sam should be like Sam in LOTR and heroically do whatever Mick says because Mick is a hero and the Winchesters are grunts. Sam knows irony.