I think Metacritic is bad, and from the poll I see that the majority of people it does affect their purchase of a game. This is really sad cause a lot of you are missing out on games you probably would enjoy quite a bit. Even reviews on games are bad when people have their own criteria for what they think is worthy of a buy 9s 10s Game of the Year!!!!
If you think about some reviews, they're inconsistent. In my opinion FUN FACTOR is what is most important in a game. Some games that don't even try for a story aspect won't get marked down, yet a game that tries to flesh out some story gets marked down for not being great. Games that are single player only might get marked down for not having any multiplayer, yet games that add multiplayer that are normally stronger single player games will get marked down for how it didn't need multiplayer or it wasnt worth your time, etc.
Then there are games that seem to get these crazy high scores, that when I actually played them I didn't agree with the high scores. When Bioshock Infinite got all them high scores I was excited but when I got into it I found myself missing the fun combat of the first 2 games. While the story was great the gameplay wasn't as good as Bioshock 2 when it comes to all the options you had in combat. GTA IV and V come to mind as well. While the world they created is ambitious, when it comes to the gameplay. The driving and shooting aren't as fun as they are in games that put those mechanics first. All I'm trying to say is don't let these review scores keep you from getting into a game you think you might enjoy.