3rd option! And do I have to pick just one? I mean come on, I need Dean for the wise-cracks when there's a really stressful battle, Sam for the puppy-dog look/angsty heart-to-hearts that instill the need to survive again and Cas because he's Cas (enough said)!
-- Sam: Take care of these guys, okay? Castiel: That's not possible. Sam: Then humor me. Castiel: Oh. i was supposed to lie. (chuckles) Uh... sure. They'll be fine, I... Sam: Just - just stop... talking.)