Not to mention the sheer amount of freedom in NV.
Most plotlines have 3-5 ways of solving them like in the Fallout of old.
Name me one modern wrpg besides NV that offers this many dialogue options and almost every options allowing a different result.

I initially liked FO3 more because of the world, but I eventually realized NV's more linear beginnings - and you even get plenty of options during that too - were just there to ease the player into the world before letting the kiddie wheels off and it works in spades.

New Vegas

Another thing I love about NV is that it makes me role play for some reason. Like, in FO3, I'd just do whatever because the game has few if any boundaries. So I'd kill people and rarely talk and shit, and you really don't have any options BUT to do everything. But NV, I'd role play as this survivalist courier fuck who by very necessity of the job mostly ran away from fights with humans but killed animals in the wild for their meat, and would use killing a last option only. My character would have a code, and with a 100 in speech, would manipulate people into situations. Not a complete pacifist but also not a complete psycho who kills everything, either. Plus, in FO3, unless something was inside someone's house, you couldn't steal. Go anywhere in NV, and almost anything you take is someone's possession, so you're going to be stealing A LOT in NV. More realistic balancing of morality?

Compare to FO3, and that's kinda impossible. Is there any way to get out of the Vault withOUT killing people? I don't think there really is.
NEW VEGAS
