Dean nods a little. Sam would be right: the only way to know if he'd be okay with being human is to experience humanity.

That gets a furrowed brow look from Dean. "Cas...as long as you're you, I don't care if your angel or human or...some sort of in-between. Yeah, sometimes it's nice having an angel on call, but it doesn't make any difference to our friendship. "You're happy. I'm happy, pretty much what it comes down to."