what the fuck do you mean, "well now now"? You haven't even played New Vegas yet for the comparison!

I'm at the endgame of the main quest, just blew up President Eden, and all that is left to rally at the Citadel and march on the Jefferson Memorial.
But I don't want to do that yet, so I'm just wandering/exploring the Capital Wasteland, and there's just fuckall interesting to do compared with the Mojave.
In addition to what Treesong said about NV having "crazier, better characters, better writing, better setting", I would add more variety of more interesting weapons, more interesting factions and sidequests and random exploring. And better enemies! After the variety of New Vegas, I got tired of the endless Super Mutants and Raiders of 3.