[quote=@Awson]
I liked New Vegas more for the main quest.

However I don't think NV is that great for replaying.

I would guess 3 is better for that, but I haven't played it for a long time.
[/quote]

I think both FO3 and F:NV are very replayable.

[quote=@Marik]
New Vegas was always more of a survival simulation to me, but I liked the stories and world in 3 better. 
[/quote]

Survival is one of the biggest attractions for me, I won't play it in anything but Hardcore mode. Also a bunch of mods that make the game 1000 times harder.

I dunno, it's just something about being a wanderer in a desert, exploring decrepit towns and bunkers, every living thing you see is a matter of life or death and finding civilized settlements offers satisfaction and a sense of hard living that FO3 just can't provide me. I guess that's why I'm a fan of the Fallout 1 and 2 for that same reason.