Nogbog,

It's amazing - it changed radically from Hinterlands onward. Hinterlands - excellent all kill quests. Searing Gorge - ditto, another great zone. The same goes for Felwood (Horde side anyway) another bunch of excellent quests. Western Plaguelands - brilliant - a small number of long running chains which are all multiboxer friendly and reward a ridiculous amount of XP - the Bulwark quests especially (Chromies quests inside Andorhal are good up to a point but devolve into collection quests pretty quickly). Top that off with a number of the quests in Winterspring and Silithus and from level 48 onwards there's really no reason to do any instances any more. I did BRD but it was a big mistake - it would have been MUCH faster to just quest it all out.