Goodsprings: It's just boring, little npc to talk to idk the town looks dead.
Keep Out sign: Not really a location but more of a mistake, never again.
Quarry Junction: traveling to New vegas i get ambushed by a deathclaw, the whole time i had to travel on Rocks.
Hidden Valley: the first and second time i played fallout nv it was so hard to find the right bunker!

Vault 22.

I'm a little baby that is scared easily.

Deathclaw sanctuary is my least favorite location in the entire fallout franchise. Too many deathclaws for my body to handle

I would say my least favorite location in fallout new vegas would have to be vault 21 (or 22 dunno) its the grassy vault. its just so idk. I just hate the atmosphere lol, that and and not being able to find the grass monsters who disappear on me for some reason.

New Vegas. The scale was off and it felt so empty. The strip was small while the casinos where large, but filled with 10 NPCs.

For me, Zzzz...ion. It's so empty and boring save the odd few annoying White Legs that show up to pester you from time to time.

Edit: This is outdated.

My least favourite location is the fort in new vegas, I hate that there is a big place full of plundering, murdering scum. Trash is supposed to live in a landfill not a fortified base!

I'm gonna have to agree with the some of the others, Vault 22 made me really uncomfortable for some reason, that along with the boomers vault, Vault 34

The Glow from Fallout 1 , I always leave that place throwing up my teeth and my skin melting off due to serve rad exposure.

Dunwich Building in Fallout 3 anyone? That building is just dark and eerie.......I mean it's also the 1st time you encounter supernatural thingy in a Fallout game.

Edit: I read most favourite instead of least favourite... i'm an idiot.

However... I hate Vault 22, it's a place full of damn plants and spore monsters, really annoying.
But I hate it for 1 reason... you have to do: go down, go up, re-go down, go up again and, if you forget to trigger the quest from Camp MCCarran... you have to do it all over again -.-

Its not only one, the most hated locations in FNV for me are:

1. Quarry junction: ugly place, ugly beasts things.
2. Vault 22: went in running, came out running, dunno why, just didn't wanted to stay in there.

Also, little story, at first I used to hate Point Lookout, until I gave it a good chance and in a playthrough went there, I ended up lovin' it .

I just could not bring myself to like the Capital Wasteland. The place just didn't strike the right chord with me like the Mojave did...

Oh, and the metro tunnels were just annoying to deal with. At least I enjoyed the Pitt quite a bit, still not sure why.

In Fallout 3, My least favorite place(s) in the entire game are the hundreds of stupid and pointless metro tunnels that just serve to throw my markers off in different directions.

In Fallout New Vegas, I hated Vault 22 for it's complexity and the amount of annoying spore monsters in that place that always jump out at you, But the REPCONN facility is much worse, to me, Especially with the Nightkin that always jump out and brain you from nowhere.

REPCONN HQ from FNV and The Metro Tunnels from FO3, i hated those two places so much.

This may be unconventional, but I have to choose Novac. Even though it is nothing more than a dump I really don't know why I hate it so much, everytime I get there I want to get the hell out of there as soon as possible. Does anyone else has te same feeling ?

Mojave Wasteland. Was bland for the most part. Kinda felt like walking simulator at times. So, tmm 1 and mods= good time

I hate the deathclaw's cavern in FO3 because every time i go in, I easily get lost in it and if I don't use consol commands, I could take an hour to find my way.

ncrcf too boring not enough things to shoot.

The foundation of my favorite games is the fallout from the game Megaton FO3. This location is for me so extraordinary that it is like a asylum for the player, to the whole design of this place is very original and of the atomic bomb in the middle of the whole settlement.