I'm still early in Abby day one,
but I'm actually surprised that I'm enjoying her storyline. It's hard for me to stay mad at her after seeing her side of the story. If you're pissed at her, then you'd have to be at Ellie also. Joel killed a lot of people. And that's kind of the point. It's all about perspective, there are no 100% good guys and bad guys in this universe (though you could make an argument for David's group). And it makes you think about all the people you slaughter in the game as Ellie, especially after you see their camp as Abby. They all have friends and families too. Though they all shoot you on sight, so it isn't like you have much of a choice.