This game seems to divert from what made Fallout 3 so revolotionary as far as level design... instead of a predominantly urban environment, you'll find yourself basically in a desert. This in of itself isn't bad, cause with the 'Hardcore' setting and how it encuorages you to play, it really comes together in a completely different experience then it's predecessor, with equal to greater merit! I have gotten the first 3 DLC at launch (I'll be getting the last one soon enough), and what justifies their cost is a priceless surrealist experience that can't simply be described... I played the first DLC under the influence and I would say didn't so much as 'played' the game as opposed to having 'lived' it. This game for it become enjoyable requires your investment in time and emotional involvement... some of the places I saw and gotten to experience in this game preside happily as one of the most enjoyable and serene moments of my gaming life.
Also... there's a overall thematic effect that this game seems allow you to indulge in, and that's the feeling of being on the verge of discovering something new if you simply pursue the horizon for just long enough.