I love Hardcore mode. I always felt like I was ludicrously overpowered in Fallout 3 because at even a modest strength level I could carry one of each type of weapon so I always had the perfect loadout for any situation, and carrying unlimited ammo in a type I never used (say, 5mm, since I never used the Minigun, or .32 once I got Lincoln's Repeater to replace the Hunting Rifle) was basically carrying around money by another name (and once I hit level 30 and had a maxed-out character, it's not like I even needed money because Barter was so easy). And any enemy, no matter how powerful (SM Overlord with Gatling Laser or Tri-Beam Laser Rifle, I'm looking at you) could be handled by spamming the Stimpak button, which I'd hotkeyed.
Can't do any of that in New Vegas. Ammo has to be conserved because it has weight (and in case of the .50 MG ammo for the Anti-Materiel Rifle, aka "the only Guns weapon that does shit against Deathclaws at least until they close range, in which case you're fucked", it's quite heavy), Stimpaks heal over time (you're better off maxing Survival and making Desert Salad and Brahmin Wellington and Caravan Lunch and spamming THOSE, but even that only works short-term), and the game just generally feels 1000x more immersive.
Can't do any of that in New Vegas. Ammo has to be conserved because it has weight (and in case of the .50 MG ammo for the Anti-Materiel Rifle, aka "the only Guns weapon that does shit against Deathclaws at least until they close range, in which case you're fucked", it's quite heavy), Stimpaks heal over time (you're better off maxing Survival and making Desert Salad and Brahmin Wellington and Caravan Lunch and spamming THOSE, but even that only works short-term), and the game just generally feels 1000x more immersive.