Here's what I suggest; those who want Fallout to be a PnP-game, make one yourself using whatever ruleset you prefer, and let those who actually enjoy computer games have fun with those without having to jump up on your high horses and speak the holy gospel of the True Fallout Game!
First, let me say I've been in a similar situation.
Final Fantasy. I can never get into a Final Fantasy game. I can look at it and say its cutscenes have great visual quality, I can say that the games look nice, and I can say the soundtrack is amazing. But when it comes to gameplay, I think it's dull. Horribly so. And so, I don't play that series. I don't expect that series to someday conform to my tastes, and people will continue to be happy with it.
In that same vein, Fallout 3 should not be expected to go ahead and rewrite the entire franchise. Fallout the series has a fanbase, a built-in following. I'm sure you wouldn't like it if someone took your favorite game series, and then reworked the basics of how it played into something you find detestable gameplay-wise.
I like the style of gameplay emulated by the Fallout games because it involves strategy. It's like playing Risk or a less abstract chess, but with a story. Why not just pick up a pen and paper game? Well, that's fairly obvious, to me.
-My schedule doesn't always line up with people who would want to play a pen and paper game
-Computer graphics
-Automatic dice rolls
-A more "immersive" feel
-A large world that is well-built and hasn't been crafted by myself and/or friends
-No set-up
-I can quit whenever I want, and come back whenever I want.
-It's about ME, and nobody else. Fun times.
I may like Fallout 3, and enjoy it. But that's because I also enjoyed Morrowind and Oblivion, so I have an appreciation of this kind of RPG. But those who outright hate Fallout 3, I can definitely understand. I have a lot of issues with Fallout 3, and I consider it as an inferior game than the first two(but better than any of the other spin-offs). As far as gameplay goes, Fallout 3 did not live up to any hopes or expectations by the people that had played and loved the original games. We've gone so many years without a "proper" Fallout game. When one comes along and it's not what you wanted, it's saddening.
And furthermore, now you can't say you like "Fallout" without the disclaimer that you don't mean the new one. That's annoying.