Ah, from a pillaging viewpoint then -
Midnight, a dark setting, if you are looking at ways to tweak the feel of a D&D world, starting with the tropes (orcs, goblins, elves and dwarfs) then it is great for plundering.
Pathfinder, the Paizo 'not a magazine' setting - twists a lot of the standards around in interesting ways - goblins are nasty, sadistic, crazy little bastiches.
Scarred Lands, less to plunder, perhaps - the world is self consistent, ravaged by a war between the gods and the titans, within the memory of many dwarfs and most elves. Better if you are building your own world along similar lines.
Eberron, a setting that I did not expect to like - I avoided it for a long time. And like a lot of settings that I have avoided it was the negative reviews that caught my eye.... 'Wait, that sounded
good. 
' I like it better than any official D&D setting since Birthright.
The Auld Grump