New California Republic but if they turn out to be "goody boring 2 shoes" then ima goin neutral and killing everyone in my way.
Trust me: They're not. Granted, they're a lot more "good" compared to all the other bastards out in the wastelands, especially given their anti-slavery stance, but to paraphrase their former president Tandi from Fallout 2: She knows when to deal with a snake when she has to. And they did. (EDIT: You'll probably have to do a little digging to get the "dirt" on the NCR, because on the surface they intentionally present themselves to be "goody two shoes")
As for me, I'm simply going to follow the main quest and try to stay as neutral as possible without siding with anybody. During the game, however, I'm going to look around, investigate, and ask everybody about all three major factions, and try to learn what goes behind the scenes. Once I've learned all I think I need to know, then I'll pick a side based on what I think is ultimately good for the wasteland in the long term.