First I'll start off by telling you the changes in FNV from F3. I can say without a doubt the entire core system regarding skills and stats has been upgraded for the better.
Special points and stats make more sense now but still fall short on which perks will be available to you. For example perception unlocks key gun element perks however it says in its description that it basically doesn't have anything to do with guns. So in that respect it still felt short of "amazing".
Random items are more useful now since there is a much larger crafting field to play on in this game compared to fallout 3.
There are much more defined class builds this time around because the skills and stats have been reworked to fit each other better, however like I said before some still don't mingle well with the right perks that become available to you. So creating a specific type of character actually makes a lot more sense this time around, however you may get disappointed later down the road when you are wondering why you never got certain perk options that seem to be key for specific builds but just weren't there unless you researched builds before making a character, which you shouldn't have to do.
The graphics visually look the same as Fallout 3. I am not even sure there are any enhancements at all in visuals aside from some dust storms that are rather mediocre and, what seemed to me, to be fixed in specific locations. Aside from that there is no other kind of weather. No lightning storms, no rain, nothing other than the occasional strong breeze that blows dust around.
Fallout new vegas offers a new game mode called "hardcoe mode" Which is an optional difficulty setting that pops up right after you finish creating your character in the beginning of the game. Basically stim packs heal over time and ammo has weight and such, when you get crippled limbs they can't be repaired with stimp packs, only doctors bag (a new item) or by a doctor. Food//water and sleep is a necessity in hardcoe mode and it doesn't hinder gameplay or make it an annoyance. It actually made more sense playing in hardcoe mode then it does without it.
It also goes on to say that you will receive a special reward for completing the game on hardcoe however all this is, is an achievement and the ability to turn hardcoe mode on//off at will in the options menu. Hardly a reward.
There are a lot more factions and people that can hate you in this game than there was in fallout 3. There are actually just random small villages that either like or dislike you based on what you do for them or to them which was similar to fallout 3 but more pronounced in a sense.
You will enjoy all of this until you abruptly finish the game and aren't able to continue playing. That's right, you cannot continue playing if you choose to take one of the three paths at the end of the game. Good, bad or neutral are all available options however each path leads to the same conclusion, the game just ends and you cannot continue playing unless you saved earlier or make a new character. The lack of space that is used on the map in new vegas is mind numbing. It's about a fifty fifty ratio. 50% space used on the map and 50% just simply wasn't used. In this aspect they fell way shorter than fallout 3 in content and exploration.
The 3 main quest chains at the end are boring and dull and leave you wondering "WHY?". The insane legion that crucifies people. The NCR that taxes people to death and no one likes and forces you to join them or die pretty much, yet protects the people, probably will turn into a communistic group if it got more power in new vegas's future. And then the neutral path that lets you control a robot army (but you dont REALLY have control of it) and lets you make new vegas independent. However you get an ominous "robots will take over the world" warning and the NCR hates you even if you are idolized if you try to make vegas independent. It didn't make any sense at all. If you are expecting anything as grand that happened in fallout 3's main quest or anything that made any ounce of solid sense then you are going to be disappointed.
There is a huge amount of large buildings and houses/huts/ranches/shacks// that are simply bordered up and cannot be accessed at all in the game and are simply there to take up visual space. You would have figured something like this would have been improved upon from fallout 3 but that is not the case at all.
There are no cities in fallout new vegas. The biggest area that could be called a city is the vegas strip and it is tiny and isn't a city. It may look big in the trailer and in screenshots but it is insignificantly small and it is instanced very poorly. You walk down one street and hit an instance, load to next area, walk down a street, hit an instance. Rinse and repeat. Very poorly done. If you were expecting any type of crumbling cities or areas of that nature at all from fallout 3 then again you will be disappointed because there isn't any of that in this game, at all. Again I'll say, most of the houses//small buildings// that ARE there in the game are simply bordered up and can't be accessed.
The amount of bugs in this game and technical problems is absolutely extraordinary. There are so many problems with quests and things you have to wonder why they didn't do an open beta.
All in all, I was disappointed in fallout new vegas. You are lead to believe the end-game will be grand as it drags you along its lackluster dull path that hints that you are able to refine specific things in the world or have some REAL control over things but you ultimately don't, and its just as boring as new vegas's lack of content and sparsely used map. The space that actually IS USED on the map have a lot of locations that are simple single-room huts or buildings or caves that have 1 or 2 rooms inside most of the time. It just didn't measure up at all in regards to fallout 3 in any of these aspects to me. The only elements in this game that were improved from fallout 3 was hardcoe mode, more weapons, and crafting. Everything else either felt lackluster compared to fallout 3 or simply wasn't improved upon enough. I mean this REALLY could have been an expansion pack for fallout 3, but on its own I'm sorry but I just DON'T see it.
I mean really why wasn't this an expansion pack for fallout 3?