Jakobstown. As well as being a perfect, idyllic place to live geographically, Marcus is the only person in the Fallout universe who has any business running a town. True, he's pretty shit at it, and keeps failing, but it would be good while it lasted. Even with the Nightkin on edge. Once that fails, and the mutants disperse, I'll stay there anyway. Hell, I'd live in Jakobstown now, nevermind in the Fallout universe.