I built a settlement early on, did a bit of the faction quests before I decided I hated all of them, cleared the entire western side of the map. Did most of the downtown Boston area. Only felt a couple real good gameplay experiences the whole time, then just burned through the story once it started getting decent.
Game just didn't grab me. I was handed crazy ass weapons (fat man, OP energy weapons, power armor) way too early to feel meaningful. Every building I cleared just felt like ammo & stimpak gathering.
In the entire western half of the map I had a single memorable encounter. It was in the Mayoral shelter. Other than that, mostly forgettable, and I just gave up.
Pickle untickled. I think I'm over the whole open world thing.