What DLC has been a waste of your time & cash, and what DLC has been totally worth it?

Discussion Rules:
(1. Please share both which DLC you liked and/or disliked. All systems are fair game. Well no, SNES didn't have dlc.
(2. Only speak from experience. Dont talk about DLC that you haven't played. (Aka, no horse armor complaints unless you really sported the bling)
(3. No multiplayer map packs (the value of those is completely tied to how much you like onlne play)
(3. Specific DLCs only. This is NOT a thread to discuss if you like the concept of DLC.

Please share with the community. Here's my list:

(1. Best DLCs ever: (a.k.a. better than the base game):

Oblivion: Shivering Isles
Fable 3: Traitor's Keep
Fable Two: Knothole Island
Peggle Nights (DLC on XBOX, standalone expansion on steam)
Civ IV: Beyond the Sword (Warlords wasn't bad either)

(2. Acceptable... but maybe wait for a sale or GOTY:
Dragon Age DLCs: Warden's Keep, Return to Ostagar, & Leliana's Song.
Assasin's Creed II: Forlì & Vanities and AC:Brotherhood: Da Vinci Disappearance - (All well done, but very short. Only buy on super sale)
Warlock DLCs (Some may not agree, but I can't get enough of that game)
Orcs Must Die 2 DLC Pack (Also very short add-ons, but new traps/enemies and worth a sale price)
Fallout 3- The Pit (adds some good post-game play time by raising the level cap and striping away your overpowered weapons)
Fallout NV - Old World blues (quirky and fun, but grinds via fetch quests)
Borderlands 1: Claptrap & Underdome (Not bad, but a little too much deja vu and grinding)
Iron Grip Warlord: Scorched Earth (Only adds a few bells and whistles, but makes the game actually playable by balancing AI)

(3. Bad and/or Waste of cash:
Dungeon Defenders Eternia Crystals (adds spiders, yick!)
Fable 3: Understone (short & bla)
Fable 2: See the future (see above)
Just Cause 2 items/vehicles (in game items are better)
Yes, Oblivion: Horse armor... I just had to have the bling

I have another dozen-ish DLCs that I've picked up without playing, but above is my current DLC past. What's yours?