Did you like Fallout 3? Then you will not notice anything drastically different from New Vegas. Its all there… The choices you get to make along with friends or enemies of said choices. The Pip-Boy The bugs, and not the six-legged variety either. So is it worth the hype? Not really… I think it was more a victim of riding in the fan-hype of Fallout 3. The graphics, sound and voice-acting is what you'd expect New Vegas to be. So why did I get this game? I had so much fun on Fallout 3, I wanted a whole new area of the Apocalyptic wasteland to play in. Fallout New Vegas does just that, they've added a hardcore mode which I like, since I'm an old hand at the game hardcore mode makes it that much more interesting as ammo has weight, you have to watch food, dehydration AND sleep as new factors into traveling the wastes.
For those whom have played Fallout 3, you know what to expect. Bethesda have not really messed with the formula, they've tweaked it, added embellishments and kept the same tried and true methods that worked well in Fallout 3.
Newcomers to this genre/game would be advised to buy the Game of the year Edition of Fallout 3, it gives you more bang for your bucks