The first faction I chose in Fallout New Vegas was the NCR mainly because I saw them as a faction that was going through a hard time and could end up being more powerful than Ceaser's Legion because of the Legion's lack to field troops with sophisticated firearm training. Though I did know that the NCR suffered the same problem of supplying their troops as the Legion did though as the Courier you could resolve the NCR's supply problem to an extent unlike the Legion. It also helped me to see more of the NCR and even get some of what the lower ranking troopers felt about their deployment into the Mojave, unlike what the legion would have to say, mainly because Ceaser sees it as his milestone to transform his nation into a true empire so his men don't say otherwise. Though I do see problems with NCR's expansion into Mojave, it's mainly artificial rather than natural because even to an extent nations become bigger when they need more resources for their population, economy, and infrastructure though the NCR in New Vegas and a bit before has rushed it, maybe because they didn't have a leader who was not only strong, but also wise enough to lead the NCR after their most successful president, Tandi died. Additionally the NCR has problems with term limits.