I'll be honest here, I've played all the Fallout games (except BoS, fuck that shit), and I've noticed a lot of people on here blindly hate Fallout 3 while praising Fallout: New Vegas. You seem to hate Fallout 3 for it's many flaws in both writing and level design, while conveniently ignoring the fact that NV shares many of the same problems.
I'll list a few, for those willing to give a fuck:
-Caesar's Legion, a band of glorified raiders who think they're in rome for some reason, who are rarely armed with more than throwing spears, machetes, and the occasional lever action rifle are somehow able to go head-to-head with the NCR, which is pretty much U.S Government 2.0 and win in several instances.
-Fucking invisible walls everywhere.
-Mr. House is betrayed by Benny, who just shot the player character in the head and took the platinum chip for himself and is planning on taking Las Vegas, completely trusts said player character not two seconds after they had destroyed the securitron gatekeepers and neglected to pay the useless 2,000 cap entry fee (or not, but either way it doesn't matter).
Not to mention NV is just railroaded as fuck for the first act.
>lol ur off the leash now that the tutorial and prologue are over!
>wait where are you going
>AWOOOOOOGA AWOOOOOOGA
>THIS IS HMCS J.E.SAWYER
>YOUR CURRENT COURSE HAS DEVIATED FROM OUR STATED PLANS FOR THIS ADVENTURE
>ALTER YOUR COURSE TO 180 OR WE WILL BE FORCED TO DEPLOY THE CAZADOR SQUADRON SUPPLANTED BY DEATHCLAW INTERDICTION TEAMS. REPEAT. ALTER YOUR COURSE TO 180. FAILURE TO COMPLY WILL RESULT IN YOUR DEATH.
Meanwhile, FO3 is just
>lol ur off the leash now that the tutorial and prologue are over!
>no seriously I can tell you to go over there but I really don't give a shit
>maybe check out that school? there might be lasers or somethin'
>j-jus sayin'. it's not like I want you to have fun or anything!
I'd list more, but I don't really have the time to type out a 50 paragraph long list of all the things that are wrong with the game.