In my opinion, Fallout 3 cruelly lacked of these elements. The main plot was rather flat and consisted in some sort of a scenaristic patchwork from the previous games. (Vault experimentations were from Fallout 2, Eden as a computer was from Tactics). With New Vegas, I was pleased with the chosen factions. Let me explain.
The New California Republic embodies the values of the American Constituation : it values freedom and democracy. On the other hand, it is crippled with a slow and complex bureaucracy. And what I remember from Fallout 2's NCR was a city in which there were cops at each street corner...
The Caesar Legion is a slave-based society... And so was America in its first centuries : some historian even talked of "slaveocracy". Indeed, slavery was at the very basis of the economy, much more than in Europe.
Mr House is interesting as well. From what I understand from the previews, The Strip is depicted as "entertainment dictature". As long as people play and spend their money, people do not use their brains. I do believe that is Mr House's goal.
I see these three main factions as a criticism of the US. Sure, these are charicatures, but they make sense. What do you people think ? Am I over anolysing the thing ? I know it's just a video game, but think about it !
