Looks like 2 votes for a New Vegas setting, which I definitely up for! 

I do like the idea of competing factions but want to keep the scale of the Roleplay pretty small. I participated in a lot of Fallout nation roleplays in the past but those were hard to maintain due to distance between some of the factions. 

For example I’d be happy with a writer taking over the entirety of a smaller faction, such as the Great Khans, Boomers, NoVac etc. But for larger factions like the NCR, Legion, BoS etc. perhaps a smaller contingent like an expeditionary force of the NCR or a Chapter of the BoS rather than RPing those factions in their entirety. 

EDIT: By splitting up the bigger factions it could allow more writers to RP as their preferred faction and increase the conflict as they have competing ideas for their own faction. 

I would be looking at time period after NV/F4, that way if anyone wants to have a character from the Commonwealth or a faction non-represented in the New Vegas game they have enough time to explain their presence. 

I’ll draft up a bit of an outline this weekend. Would love to have at least 3 other writers interested before I create a specific OOC signup.

If anyone has characters, ideas or factions in mind please feel free to post or discuss here or PM me!