I'm just glad this doesn't have the sea of "It's popular, so Imma hate on it" peeps, the vast majority of people have enjoyed it.
Because it was a good show that stuck fairly well to the source material.
The protagonist had a good character arc that avoided a lot of the eyeball inducing tropes female protagonists often end up with in contemporary TV shows and movies. (Obviously the story of the naive yoing person who goes on a dangerous journey, faces adversity and near death and comes out wiser and tougher is itself an very old story device)
Yes the 'Fallout' universe itself is rather weird/ unbelievable in places but the characters were largely consistent and believable 'within' the universe.
The only thing I would like to have seen is more of the unique animals/ characters associated with the universe (Supermutants, maybe a death claw etc). Although time and budgetary constraints obviously limit what they could include in a first series.