on role reversals in SPN and how it's not a new thing

[amonitrate]

(from season 3)

SAM
Look, Dean, you're leaving right? And I gotta stay here in this
craphole of a world, alone. So the way I see it, if I'm gonna make it,
if I'm gonna fight this war after you're gone, then I gotta change.

DEAN
Change into what?

SAM
Into you, I gotta be more like you.

(via dafnap)

I could go back further, into season 1 probably, but this sums it up nicely.

Feel free to discuss season 6 spoilers in comments.