To me it just seems like you're being stubborn for the sake of it.
FO:NV, for me at least, is different to FO3 mainly because it's developed by Obsidian. Sure it uses the same engine, but it really manages to capture the fallout vibe, and feels more like a fallout game than 3. As for why is it a different game? Well, if it was DLC it'd still be great value for money, and it's got more content than Fo3 + DLC's had (imo) so...
It's less being stubborn and more not wanting to spend £30 on a game I already have.
@Calhoun: I loved Banjo Kazooie, never touched Banjo Tooie.
@uniman: Never played FO1 or 2, so the comparison's no help.
Despite all this, I have money, so fuck it, I'll buy it. But if it's shite, I'ma come back and rant. Be warned.
Eh, I disagree on FO1&2 comparison here... FO1 was smaller than FO2, but it had a cool questline and many characters which had awesome dialogues (and the % of "talking heads" to total NPC count was higher).
What did we have in FO3? One more or less developed-city (Megaton) with just a few quests, the most important of which was very annoying, although quite interesting at times... Then we had Rivet City with a few quests and different settlements with 1-3 quests... Most of characters had similar or same voices, and quests in majority were quite bland.
Now the most important thing... How many ways to play the game did we have? Right, we had one good ending (when you die or not, it's still the same) and one bad ending. Most of quests didn't matter. Factions didn't matter much. Raiders were enemies, settlers were friends.
Now Fallout:NV. We have the starting town with a few quests. We have many settlements with a few quests. Sounds similar? Right, but characters are greatly voiced and most quests make sense. Also there's a new "reputation" system so you do not work for good/bad, but for different factions, which usually allows more than one choice, and you have to think what do you want. There're still a few a bit silly/illogical quests when you start to think, but there's a lot of really good ones. Also there's a lot of "hidden" quests which are either like rumours (not in quest log, there were a few in FO3 but here much more) or you have to meet some requirements to get them, so they pop quite randomly and you can get them on your 2nd/3rd walkthrough without knowing about them.
And then here's Vegas, which basically consists of Strip and a few towns, with tons of quests. Also there're multiple Vaults to explore, and they are usually related to different "outside" quests, so it makes it more interesting than "dive in, loot, leave" or "go in and complete a local quest". And the most important part: the raiders are not necessary "bad guys", there're many factions and you can work with them or kill them (or stay neutral).
About main quest: the main questline has 4 major "branches" with subbranches which have many quests and lead to totally different endings (you either serve 3 major factions or yourself). Also most of side quests are still related to the main questline, so your ability to complete/fail/miss them affects the ending, so you have much more reasons to play side questlines rather thain FO3 where they looked like fillers for the timespending.
There's a lot more stuff to add. But main advantages of F:NV over FO3 if you want it:
- Better dialogues, quests and voice acting.
- More interesting characters (probably is the same as the 1st)
- More developed places
- Faction system (a lot here: no more "good/bad" choices, playable raiders, ability to destroy/ally factions and sometimes make them to have peace)
- More useful "speech" skills and various funny perks like bachelor/woman killer; basically dialogues have much more checks now which can end quests in quite different ways.
- A general atmosphere I like more, the landscape is not perfect but towns and overall design is quite good.
Now this sounds like a fanboy yelling at you, but mind you, I am not really happy with F:NV, it's just my constructive criticizm.
It still has that insane "hp per level" thing which makes strong NPC to shoot at each other for minutes, which really breaks the immersion. You should use hp/armor balancing mods which decrease overall HP and increase importance of armor, this way the games seems "right". Also it needs a lot of other mods to make it funnier, BUT it's quite very funny even with only balancing mods, in comparison to FO:3 which I played once and stopped playing. Here I am starting my 2nd character soon, I want to play quests differently and try other factions.