I'm a solo player. I have no friends in the game, and none of my true friends play it either. So I have no one that I speak to and no one I feel I'm allowed to bother for a favour. Even just asking someone in my guild a question feels like I'm inconveniencing them, although they've never actually displayed any behaviour to show it. Even so, I stick to my solo playing, flying around doing archaeology, exploring, low-level raiding and so on, and I might occasionally sign up for a scenario, but that's really it.
And so, I only 'speak' to NPCs when I pick up or complete quests.
On my travels through the Jade Forest I found a little island with a Horde factioned Pandaren sat in a fishing chair. To be honest, he has a nice set-up, and I'd gladly take the place for my own when next he travels. But, sadly, he seems pretty content there, and his furry bum is glued to the seat.
I spoke to him today, though he had little to say. I also spoke to Master Nguyen but I couldn't get a good shot of him since he refuses to turn around. And so I give you Ky-Le the Traveller. Someone I 'spoke' to today.