As we all know Bethesda games are unparalleled in the sheer amount of freedom they give. You can follow the story quest, you can run towards the horizon to see how far you can get, you can live out your life in the first place you come across. So with in that in mind what is\will be the first thing you do in Fallout 4?
Probably build a settlement that would rival diamond city maybe not in sheer size but in terms of defensibility and number of residents... I'm not a fan of td games but I have a very strategic mindset and I can see myself making a city fortress that could take on a army of bos paladins and a couple hundred Deathclaws with very little casualties if any