Fallout 3 had a city and wasteland partially destroyed by nuclear blasts and radiation. You were born and raised in a vault. I remember emergining from the vault being blinded by the light only to observe destruction of what was once a small neighborhood. As far as jumping into a character there has never been a game in which enthralled me more then Fo3.
New Vegas is a totally different beast. I enjoy it though I have only played about 20 hours of game play. It's not as immersive but I never played Fallout 1 or 2 so maybe that's the reason.
There are more noticeable bugs and broken quests in New Vegas. I have one where I was supposed to find 4 performers for the Tops Casino. Found all four easily but can't finish the quest because you were supoosed to find each one and turn them in before finding another one. Little things like that.
Gambling feels like it was a side thought that they threw in at the last minute. Too easy to get banned. Too easy to win.
Really, my onlyl beef with New Vegas is that they had two years to come up with something and we basically just got a rehash of Fallout 3 in a slightly smaller, less interesting environment. But again, it was my fault to assume that it would be better then F3 due to the time laspe between major releases.
That seems kinda harsh to me. For one, Gambling doesn't seem like it was a side thought to me. I mean, it's las vegas, Pretty sure gambling was a part of the game before they even had any idea about the story. Gambling and Vegas go hand-in-hand. To that note, I agree that it's too easy to get banned from gambling. but the ease of winning comes from having a high luck stat. I think having a high luck stat should also increase your winnings before you get banned. Maybe throw in a 100 speech/barter check to get unbanned somehow. I dunno, but I do agree they could have done more about that.
I agree with the immersion of FO3 compared to "Hey, wake up, welcome to New vegas, heres a dam, oh look, bad guys invading, oops, all done!" hehe.
New Vegas's key redeeming factor for me is the iron sights, and accurate shooting. Sniping in New Vegas is easily 150x better than it was in FO3. Hell, shooting in general is 100x better.
It's so very satisfying to take the bloody mess perk, and watch someone/thing explode 200m out, lol. Add to that Boone and ED-E's perks, and being a sniper has never been so much fun/overpowering.
However, I also really like how you can no longer be a master of all trades. in NV, you actually have to kinda specialize. You can only max 5-7 skills depending on your int. There are 13 skills in total. That means that most characters won't even be able to max out half of their skills. That is good. It took me nearly 2 weeks to get a platinum in NV. it took me a few days on FO3. And trust me, when I play a game, I PLAY the hell out of it. I've probably already got well over 100-150 hours into New Vegas. lol.