I don't understand why people are ragging on Fallout 3's story though.
Because its literally destroys canon.
Fallout 3 starts out simply amazing. You literally get to live life in the Vault and get attached to the residents inside of it. Once you are thrust outside it's a bit of a shock. You look around a bit and then realize you have no idea where to start, but that the possibilities are endless. Up until the sequence where you finally find your Dad, the story is kind of "meh", but doesn't let up from there. Activating the purifier and seeing the main villains roll in while you could do nothing was great. Finding out how the super mutants were made by just reading it on the computers was awesome. You actually had to take an effort to look around that place instead of having it thrust onto you. Meeting the president of the Enclave was a bit of a twist, and the final fight was great as well. The ending scene though, I agree, was a bit underwhelming.
The thing is I never got attached to anyone in Fallout 3, the dialouge was too poorly written for me to take the game seriously at all, not to mention dad is an idiot who doesn't know how to purify contaminated water (hint USE DIRT).
The way New Vegas' story starts sort of fails in comparison. You're just told to go find the guy who shot you and pointed off in a direction. There's no real emotional value besides the whole "revenge" thing. It took me awhile to actually start caring about the main quest. Once it does get rolling though, the four faction thing is pretty interesting.
I don't know, I think immediately getting shot in the head is pretty kick ass way to start a game, and I felt some drive for answers, mostly I just wanted to know what the hell the platinum chip is, In Fallout 3 Dad leaves the vault, but at this point I don't care too much about him, so I just left and did my own thing, I felt no drive to do anything, I felt more sorrow when Cass died in my hardcoe playthrough of New Vegas then when Dad died in Fallout 3.
I feel like the majority of the characters just feel... bland though.
I feel the same way about Fallout 3's characters, the poor writing, the repetitive and meh voice acting.
also Three Dog, him alone is reason enough.
This is despite the fact that New Vegas is full of an insane amount of bugs while Fallout 3 has significantly less.
My experience in New Vegas was pretty much bug free, NV only started crashing once I started modding it, Fallout 3 was buggy PoS and the DLC's were always broken on release, so far any NV DLC has not broken.
obviously these are just my opinions (as uninformed as they are) and they are based on my experience with these games on PC. Simple put it pretty much comes down to if you want Oblivion set in DC with Guns or a First Person Fallout 2 set in Vegas.