As far as linearity, FO3 was much more linear than NV. Having a bunch of disconnected islands of content doesn't make a game less linear...it just means it has more one-off side locations to find. As I've said in a lot of other threads, NV's world feels a lot more alive and believable than FO3's does. I felt FO3's world didn't make much sense and wasn't very convincing.
Overall, if your main priority is having a bunch of little rides to go on dotting the landscape and you don't care whether or not any of these places make sense then you're going to enjoy Fallout 3 more. If you're looking for a believable place full of deep characters and non-linear storytelling then NV is where it's at. It all depends on where your priorities lie as a gamer. For my money NV is by far the better game, but I'm more of an immersion player than a mileage player, so there ya go. I'd rather spend 100 hours in a convincing world than 300 hours in a world that feels like a bunch of disconnected content with little continuity or consequence...if that makes sense.
That's not to say it wouldn't be neat for NV to have more random stuff to discover, but it's not my top priority. Needs to be more spread out and inter-connected, though. I kinda felt like FO3 felt a little too crammed full of stuff that was too close together and too unrelated to the rest of the world.
Well put. Of the major RPG titles in recent years, FO3 had one of the most linear paths. Just because a game has a more open environment does not make it less linear. There were three ways to play FO3 - Good, Bad and Neutral.
NV, on the other hand, seems to have nearly endless possibilities as far as choices go. The reinstatement of the Reputation system gives the player dozens of options when it comes to story advancement. I adore how Obsidian has restored the whole "play one faction against the other" options that were in the original games. I remember when I first started questing for the Powder Gangers and then had to do recon on NCR and find out about their upcoming raid -- then at the last moment, I sided with NCR and conquered the gang that trusted me. It was so nostalgic of the Killian Darkwater vs. Gizmo's Gang conflict in Junktown back in Fallout 1.
As for me, I could give a rat's behind if the environment is overly polished. I want options. Choices as to how my story progresses. Obsidian brought that back to the franchise, and I worship them for it.