Yahtzee seems to be quite interested in the narrative of a game. He's always criticizing story structure for its integrity, characters for their consistency, and atmosphere ... well, atmosphere is more or an overall result, but that too.
Given the fact that most games have terrible writing, or the writing just doesn't seem to stick with what the game is going for, it's very usual you'll find Yahtzee skull fucking most releases.
He may pass off as being opinionated, but if you look at it from the perspective of "oh, he's mostly after the story ..." then you may be on the right track. So yeah, I tend to take him seriously.