And frankly, that was the last time any of my Horde characters got any serious play.
Since 5.1 I've felt myself shifting away from the Horde. Part of that was going back to raiding on my draenei warrior, of course. But a bigger part of it was simple ennui, and a general culture shift in the Horde that left me feeling totally unable to connect to it. When I rolled my first Horde characters (an orc shaman and tauren warrior back in vanilla days) there was a real, concrete tone shift when I played them vs, when I played my Alliance characters. A sense of desperate odds, of outcasts banding together to stand against a hostile world, facing off against a monolithic power.
That's gone. It's probably gone forever. Even after the events of Mists of Pandaria, it's impossible to view the faction that banded together from the events of Warcraft III as the same entity anymore - over the course of two expansions, the Horde went from underdogs to aggressors. And while I've heard many players say things like "the orcs are not the whole Horde" to attempt to distance ourselves, fact is, my tauren did the quests in Twilight Highlands. My blood elf led the charge onto Pandaria's shores, and he stole the Divine Bell so that Garrosh could make use of it. Up until patch 5.3, if you played Horde, there was no real way to not aid Garrosh's cause - you were complicit in everything that helped make the Warchief's plan work. The orcs may not be the whole Horde, but what excuse does that give your pandaren or forsaken, when they're the ones who delivered the keys to the kingdom into Garrosh's hands?