What is your favorite piece of DLC ever?

i barely purchase DLC, id say CoD4 map packs which i got for free thanks to PSN game sharing which is never mentioned here in system wars :(

I like the DA:O DLCs, sure, some are complete crap like Darkspawn Chronicles, and some leave even more questions like Witch Hunt, but some are great like Leliana's Song and Stone Prisoner.

Not counting Shivering Isles or the GTA4 Episodes (because they're really more conveniently-downloadable expansions than DLC) I'd say it's easily Lair of the Shadow Broker.

Pokemon DLC this gen. It isn't really DLC but it is Mystery gift you get from certain events.

The ballad of Gay Tony.

...and I have the Bus Stop Achievement to prove it. :D

Wipeout HD Fury. It doubled the amount of content in the game for a very nice price.

Slashkice

My friend got that. I was like "hey is that the new Wipeout it looks pretty similair." and then he's like "its DLC dude". Followed by me raging at myself for buying the original mw2 map pack

Rock Band DLC is my favorite overall, though which song/song pack/album would vary by what mood I'm in when asked...

Lair of the Shadow Broker is the one that comes to mind, for me. Great atmosphere, superb boss fights and great writing. Although I suppose the latter should be expected, considering the studio that made it.Doom_HellKnight