I liked both games pretty evenly, but there are things about both games that I like more or less than the other. I preferred FO3's world mostly because of the detail that went into it. However there is something about the desert landscape that makes the FONV world enjoyable also. I just can't put my finger on it. When it comes to the storyline I don't really know which I like more. I thought FO3 had a more personal storyline and FONV less so. I didn't like the fact that in order to truly complete the story of the courier, you had to buy 4 DLCs. I believe DLCs should be extra stuff that has nothing to do with the main story. I did like how in FONV the fate of the Mohave is pretty much entirely up to you whether you want to be evil, good, or somewhere in between. A lot of FO3 fans say that its a better game because of the bad ass Liberty Prime mission at the end, but I thought the end of FONV was pretty epic too. Having an army of securitrons, a bomber that nobody has seen fly in hundreds of years, artillery, a bunch of old enclave members, and your eyebot buddy that shoots huge laser beams out of his face by your side is pretty cool. That being said, I almost cried when Liberty Prime "died." :(