No, she's a bloodthirsty, uncompromising [censored].
Her approach to problems is shoot first, ask questions later.
What's wrong with non-compromising? She's a Colonel, she's served a long time and some, admittedly very effective, mercenary comes in and starts telling her how to run the show.
While I can somewhat understand her distrust of the Khans or the Brotherhood, I still find her preferred way of dealing with them to be brutal and stupid.
She doesn't even consider non-violent solutions before you suggest them to her and even then only grudgingly accepts..
Why? One is a tribe which has plauged the NCR since before it even
was the NCR and the Brotherhood are a tribe of very powerful people whom they are at war with whilst simultaniously being at war with someone else; why should she think that a ceasefire between them is possible?
Another example is Mr. House. You can keep him alive (at least temporarily) but regardless of all his knowledge and the opportunity it may present to mankind, if you tell her you left him alive, she says that she will send someone to deal with him (kill him).
Why would he tell you any of this 'knowledge' when, by taking him out of his chamber and disabling his control, you've effectively killed him, he even says he wants to die. What knowledge could he
verbally offer you anyway?
To me she represents (together with the corrupt bureaucrats) the worst side of the NCR: the cold and menacing bully.
Sometimes you just can't [censored] around, sure signing peace treaties is nice but the NCR, at it's core, is not a nice government. It's an imperialist government which, even since Fallout 2 - when the need to play up how they might be inconpetant at times never existed - they have been trying to annex stuff and, if they refuse often, they play dirty. Vault City had prime medical tech, they wouldn't be annexed, so the NCR sub-contracted the most powerful crimeboss in New Reno to hire mercs, to pose as raiders, to then bully Vault City (population 103) into annexation for saftey; based on Cass's comment of "Vault City pacifists" we can only assumed that the dirty bastards succeeded. Hell you can even turn the NCR into a fascist superstate, which even accepts Enclave refugees, if you simply assassinate a high ranking offical.