I've never seen someone RP on Guild Wars. As far as I've experienced the game is almost as drastically orientated to PvP as any online FPS around. And the campaigns, meh, you travel, fight and finally have a tea party with the big mean boss and finish him off with the words: "I'll teabag your corpse into another undeath, Tagachi!" After that you happily slaughter lots and lots of other characters until Balthazar licks your shoes.
I'm not anticipating any game, because I can't really expect anything from the gaming industry any longer.