Dean would meet the introductions with skepticism, but it's not a personal reflection on the angels. Dean just thinks Cas is the best angel.

It's a fine line to walk and really, Dean is insisting on hope because he's afraid of how Cas will take the change. Dean doesn't care if his friend is human or an angel as long as he's his friend and he's happy. He shrugs. "It'll give me something to do." There's a pause and Dean considers the situation.

"Are you going to be okay if you're human all the time? I mean...I know the human periods can be fun, but you always know they're going to end..."