Most (if not all) of Fallout 3s places had at least something of interest like a skill book, bobblehead, unique weapon, interesting backstory or some sort of quest involvement. There are places in FNV with literally nothing but junk misc items like bent tin cans and empty bottles. A few ive found dont even contain that.
Theres just no reason to get out there and explore deep into the wastes because theres nothing there. Just stick to the roads and you will find almost all the content the game has.
HUH? LMAo, its amazing how people's minds change after time passes. Fallout 3 had more filler content then most games. There were very few good side quests, most places were all the same with just useless garbage, no weapons that you didnt already have, filled with garbage like crutches, scrap metal, and all looked identical. NV has a lot more interesting areas to explore that vary, and have better loot to find. Fallout 3 suffered the same thing as oblivion, Quantity of quality. Also, the map IS just as big, it takes longer to go an inch across the map then it did on the fallout 3 map.
If you say there is nothing there, then your playing a different game, as Fallout 3 was way worse in that regard. Not to mention most of DC was linear and blocked off and connected with the same looking subway with nothing of interest in the,.
hardcoe mode also makes it more important to collect food, water, and crafting makes all that junk more usefull. real survival. In 3 it was just there for looks really.