My favorite DLC of all time is probably Shivering Isles. Sheogorath was a very...interesting character and made the DLC enjoyable.
However my least favorite was Fallout 3's The Pitt. In terms of gameplay and plot, it was good and just as fun as Fallout 3 itself. However, the city in the game looked nothing like Pittsburgh, aside from the river(were there even 3 rivers in the game?). It would have been nice to see it take place more downtown and show some of the better landmarks, other then "they used to make steel here."
However my least favorite was Fallout 3's The Pitt. In terms of gameplay and plot, it was good and just as fun as Fallout 3 itself. However, the city in the game looked nothing like Pittsburgh, aside from the river(were there even 3 rivers in the game?). It would have been nice to see it take place more downtown and show some of the better landmarks, other then "they used to make steel here."