I'm trying to understand your opinion here but this is like the exact opposite of my reality. Fallout 3 felt like a video game-ass video game. It might as well have had arrows saying: "NEXT LEVEL HERE" where themed enemy types came running out.
Hrrrm... any specific incidences? I spent most of my time in the game just kinda wandering the wastes on the borders of the world.
If it's a choice between the two of them, I'd much rather have the quest in an RPG. Obviously it would be nice to have both, but a quest is actual content and it is a better showcase for Obsidian's strengths.
Far be it from me to begrudge you that choice. I'm an immersive sim guy myself; I love inhabiting a reality rather than playing in it. If the next Fallout removed RPG abstractions and moved closer to a simulation, like STALKER or something, I can't tell you how happy I'd be, but that's just me personally.
I feel like... when you put a game in a first-person perspective, you have to design to that perspective. The world, and the act of inhabiting that world is why Fallout 3, despite its inferior main quest, poor overall writing, weak shooting mechanics, and so on and so forth, has much higher review scores. I feel that if Obsidian had made a better world--if they'd capitalized on the first-person perspective, the game would have scored higher. It was absolutely the better RPG overall, and I loved the implementation of things like the weapon modding system, but it was fighting the first person perspective the entire time.
Maybe if they'd made it like Dragon Age: Origins (that is to say: accessible isometric RPG--because admit it, you know Obsidian would make an amazing Dragon Age game), it would have been absolutely flawless, but they didn't. They made it in first person without making a very good first-person world.
I'm getting repetitive. Sorry.
I wish I could hang out at their offices and chat with them about this stuff.
Also, completely unrelated to this sub-discussion, but related to the topic at hand: Obsidian seems to need a really good negotiator. It seems like, unlike other devs, they let publishers walk all over them because they're so nice.