True, but I'd say there is a major difference between Horde-patch and Orcs to kill-patch, this being that Orc to kill-patch is boring to both factions and Horde-patch is only boring to Alliance.
Also I'd like to point out that even though Majordormo Staghelm was a NE-character (never played NE so I have no idea what kind of character), Firelands and Hyjal had nothing to do with NE-lore.
Just like Faolynn pointed out, whichever suits our needs. Also as I pointed out, there's is a difference (to me atleast) in killing cool orcs and advancing horde lore.