Borderlands 2: Tiny Tina's Assault on Dragon Keep
Just writing this up mainly as a revision to my previous write up for Borderlands 2 and to show that it was tested and no issues. Anywho, I wrote that the only good DLC at the time was Captain Scarlett. Tiny Tina's Assault on Dragon Keep is a great addition and my personal favorite. Its definitely more "silly" then the rest of the game but its a great piece of dlc to play after main campaign is complete. It's basically a Borderlands 2 humor combined Dungeons and Dragons. Expect a light hearted piece of DLC with orcs, dwarves, skeletons, necromancers, etc.
The DLC is kind of similar in some ways to Mass Effect 3's Citadel DLC [which I highly recommend]. Not technically necessary but it gives good gameplay/story that doesnt revolve around the main story and rewards you for enjoying the game/characters. They are both good pieces of DLC regardless but they go out of there way to reward you for being a fan. There are many "cash-in" DLC's revolving around both games especially but its good to see the extra effort.
As far as DLC go..