I own four: map, loot, quest, and dead. I actually disabled the dead. It offers a unique and interesting faction to play; however, the computer does such a poor job playing them that it almost forces you to manually select your opponents.
If you're just starting out, you might wait before getting any DLCs. The best part of the loot and quest packs is variety. However, since the game is fresh for you, I'm not sure you would appreciate that variety until you have a few games under your belt.
The other DLCs didn't particularly interest me except maybe the latest one.