I would love a place where you can build a house without any pre-existing buildings extsting or being able to tear down all existing buildings.
I don't wanna build next to / on top of a red rocket station, I want to build in the plane wastelands.
Hangman's Alley is fast becoming my favorite settlement, the strategic location in the center of the map can't be underestimated. I keep the population small, 2 for crops, 2 for defenses. Then I build vertically and have a nice little place above everyone else. Aesthetically, I love Taffington Boathouse which is also small. I just wish I could fix that hole in the roof.
You can also get assigned your own private room in Vault 81 if you save the kid. It even comes equipped with a bobblehead stand.
Airport Settlement is very small but you have to talk to Maxon first. In this Settlement you cant even place a Radio Beacon.
That's where I'm posted up in my current playthrough. It's great for a personal base. The hole in the roof is awful. I really wish there was a way to repair it. Also, I'm playing on console, I'd like to permanently get rid of that woman's dead body upstairs. I was able to work the two dead Brahmin off the property (they eventually just disappeared), but that damn body keeps returning. They should really add a way we can scrap scripted dead bodies on build locations (maybe into bones or something).
kellogs place can be used, its safe storage the containers there don't respawn, also the "wherehouse in diamond city has one non respawnable locker, there's some others, i don't think the mayors office containers respawn.