User blog comment:TW6464/What was the best DLC?/@comment-4707281-20130315103215

Single player? Between Overlord and Citadel. Overlord has the best substance (main mission) but Citadel offered the best lasting content (a new hub area).

Misc? Firefight pack. I've got the Firepower, Firefight and Groundside packs, and Firefight added more than Firepower. Haven't actually played 3 yet since buying Groundside.