I watch Yahtzee for entertainment and don't take his opinions into account when I am deciding what games to play or buy. I view him as a source of entertainment and that's it. There is a lot of stuff I disagree with him on. However, I do want to point out that that doesn't make him "wrong" as these are mostly all subjective things that will vary depending on individual taste:
-Disagree that the Half-Life 2 games have great pacing, and his assertion of unparalleled quality for anything Valve related: I think Half-Life 2 and the episodes had sections that moved along well followed by long sections of boredom or tedium, or a section that started out being good but was dragged out for way too long. The only Valve stuff I have liked are Portal 1 & 2, so that's something he and I have in common.
-Story has a great deal more importance to how enjoyable a game is to Yahtzee than it does for me: As stated above, that's just a matter of personal preference. But to him it seems a good story will compensate for mediocre or bad gameplay if he thinks the story is good enough.
-Disagree with his hatred of regenerating health: I think games with regenerating health can be fun in more action oriented games. It doesn't work for everything though, but he seems to think it should not exist at all.
-Disagree with him on his hatred of shooter games where you can take cover: I don't think it's a bad thing by itself, but EVERYONE is making them now and they aren't making them fun, so I do get sick when I see a developer making another one because the odds of it being good are slim.
-His love for Painkiller and Doom 3 BFG: As far as Painkiller goes I don't like shooters unless my enemies also shoot. For Doom 3 BFG, I found it boring and tedious, yet he loved it because you had to go through levels finding keys to locked doors for yourself. Just having that in a game doesn't automatically make it fun in my opinion, but he made it sound like it does for him. Again, personal preference.
-I liked Nier alot more than he did, and the soundtrack for it is in a three-way tie for best game soundtrack along with Chrono Trigger and Chrono Cross in my opinion.
-He has a love for slow stealthy games (Thief) that I don't share.
-He loved Far Cry 3, I found it tedious and boring: I think this kinda goes along with the Thief point above. But that doesn't mean I don't like a shooter unless it's action packed. I liked Bioshock alot and it was a shooter that was slower paced and had exploratioin.
-The story of Spec Ops The Line and it's in-game execution was a lot more impressive and deeper to him than it was to me.
-He thinks that Bioshock Infinite is an improvement over Bioshock in every aspect while I think it's a step back in every way except graphics: The gunplay is MUCH worse than it was in Bioshock, the exploration is gone, looting and searching isn't rewarding anymore now that it feels like a tedious requirement, the way I have to get health from fallen enemies by searching them doesn't fit with the kind of fast run-and-gun shooter mechanics they used and the story doesn't feel like it was thought all the way through. The game as a whole feels like they spent 6 years messing around and then threw something together at the last minute when they realized they were out of time.
Like I said before, these are a matter of personal preference. However, Yatzhee does sometimes get things blatantly wrong and will list it as a negative in a game, and that bugs the crap out of me. Namely, him saying that the cutscenes in the Witcher 2 were unskippable when, in fact, they are. If he had bothered to click the mouse buttons during the cutscnee or even pressed ESC he would have realized this.