Building bases is fun in Fallout. I wish you could trigger more events that involved the bases. They could have huge base battles, random character events, base quests and more.
Seeing what people can accomplish in this game makes me want to buy it...almost. I've heard the storyline is fairly short, but if there's enough content such as base building, it might still be worth a shot.
Fallout story lines are always very short. The good thing about them and Elder Scrolls games is the additional story lines you can find from exploring and player made mods for the game. It is one of those games where if you dont enjoy making your own adventure then you wont like it.