Oh, you should definately get the DLC
Operation Anchorage is a bit dull at times, The Pitt is awesome, first time in a while that a computer game has made me actualy think about a moral choice I had to make, not giving too much away, but it's rather hard to figure out who exactly the "good" guys are. Broken steel is awesome also, loads of pitched battles, some real hard bastard enclave folk and makes the game a whole lot tougher. Personaly I love fallout 3. It's amazingly dystopian, picking around irradiated wreckage to gather enough food and ammunition to survive, and the fact that the main quest, the big one is merely securing a water source for a few thousand people that probably won't make them die from horrific radiation poisoning.