Therein lies the problem, the one big bustling city. I.E. Diamond City, isn't all that big or bustling either. Not to mention, very few interesting quests to come from there, aside from the main quest. Personally, perhaps it's my love for Skyrim but I would have preferred more cities. The reason is simple really. While Bethesda gave us the power to make our own little settlements all over the Commonwealth, these settlements lack don't feel alive. The people are generic settlers, the quests are repeating and not all too often at that. It's hard to feel for them. Not to mention the very very very limited and underwhelming settlement building system. To which I find ironic. On one hand it seems like Bethesda wants to give us the power to make living breathing towns and on the other hand, the entire system used to make it feels gimmicky and tacked on because it seemed fun. The lack of thought to it kind of makes me feel uggghh.. The ridiculous collision limitations, to the underwhelming amount of options you get, to the most silly limitations to what you can build where. For example, you can't put a doorway inside a house. It has to face outside cause... -_- On a good note there's mods out there already adding more stuff, at least on that behalf, however, I personally never wanted to deal with building a huge settlement, or a settlement, much less build up all of commonwealth. Never cared for it, not to mention, I feel like it's all a hassle and as such I don't really care for it. It is HOWEVER nice to have the option of course. Would die for a 'repopulation' mod, giving more settlers/scavengers/raiders and ALL that kind of good stuff and have them wander all around the Commonwealth in a more frequent manner. More trading caravans / more raider parties actively travelling and respawning. Not to mention, respawning bases would be cool for raiders, not sure if there is any but I've personally not seen any base respawn unless a quest calls for it. Oh and yes, Frostfall / Live another life and more survival stuff would be make this game totally gold. Just imagine, with actual support via mods to make proper settlements anywhere, plus live another life to become a raider or even just a SMALL raiding band. Then simply rob and pillage nearby settlements/travelling folks. Would be epic! I just hope with the current, already established settlement system would be tweakable to that extent via whatever means we're given F4SE/CK what not.