Mr. House is a self-proclaimed autocrat and shows definate symptoms of narcissism. He's a good leader, but I think that he would prefer a bullet through his head over losing so much power. Also, Veronica thinks he has a robot fetish, so that would be rather awkward.

My take on the factions is this:

NCR:
The closest to a contemporal democratic government like e.g. USA you can get. In principle they have good intentions and mostly acceptable methods to reach them.
The big BUT: They also have a lot of persons like Col. Moore or General Oliver, who think that the end justifies the means, leading them to do stuff like the Bitter Springs massacre.

Legion:
Caesar has a high goal but even a good intenting tyrant and mass murderer is still a tyrant and mass murderer.
The society he wants to build may look good on the surface, but only as long as you are male and able-bodied so you can fight in the legion.
But would you want to be part of it as a woman? Or if you are nothing else than a hard working slave? Or a pacifist?

House:
Reminds me of libertarians. Their ideas may work in a perfect world, but just how egoistic is he going to be?

Yes Man:
Something of a question mark, but from what we saw in the end it seems to guarantee a certain independance to NV.
Also, basically it's you who is in power, so you can apply your own moral standards.

Followers:
A very idealistic bunch. Would probably create the best possible world for all, IF all would follow their ideals.
Which they aren't of course. So they won't ever get very far.

Kahns:
What I would describe as "chaotic neutral". Somewhat understandable that they repeatedly get wiped out, considering that they are mostly considered (and acting like) bandits.
However, they also get one of the best possible endings, if they only get some guidance.

BOS:
Militaristic and self-serving. Only interested in weapons. Their original mission of conserving the scientific knowledge has become meaningless because they do it for the sake of simply collecting technology. They are not using it in any way to improve humanity.

The NCR Leadership has huge problems, no denying that and I have a huge problem with them.

Bitter Springs was a horrible, stupid mistake. Boone tells you when they radioed in, command wasn't getting what they were seeing. Command thought it was Great Khan fighters, not families with elderly and children. Clearly the people at Bitter Springs should have used their own brains and gone after the Great Khan soldiers who were targeting the NCR as Papa Khan explains in the Longhouse. I think Papa said they thought the NCR would be easy pickings, so it was a valid mission to stop the Great Khans. I don't feel that what happened at Bitter Springs can be put on Colonel Moore or General Oliver...as much as I don't like Colonel Moore.

The whole thing really brings home the atrocities that happen in war. People are not perfect and war is stupid and can go terribly wrong...over and over and over again. My war solution would be for the leaders to go into a room and only one comes out unless they can decide to get along.

No, but that wasn't what i wanted to say. I meant it was caused by people like them.

I think this is pretty close to my views as well.
As for the Khans being CN it would explain my liking of them,.
It's just strange I failed to see it before your post.