To be sure, a reviewer's preference affects how they see a game. But in their honesty, they embrace this fact. The reality is, games are art! Of course the personal tastes of the critic are going to color the review. Their solution for this reality is that they candidly embrace it. They talk about what they liked and didn't like, not about how many levels the game has–and then just slaps a score over those rote facts. And their method of reviewing a game fairly is to let the person with the most expertise in the genre review it, because they are best able to compare it to what has come before it in said genre. All the editors play everything (because they love games so much, that's what they do in their spare time), but the person who does the review is the one who is most qualified. Take Skyrim for example, they'll probably give that to their lead PC editor, Charles Onyett, who is a big PC RPG fan. And then, big games will often get a "second opinions" article, where all the other editors who have played the game will weigh-in on the game in question, and sometimes they may have a different opinion than the reviewer had.
But the thing that irks me the most is when people suggest they get paid for their reviews. Simply put, that's just preposterous! And if you think that's true, then I guess you also think Bethesda is dishonest enough (and has the spare change) to pay for the 2008 GOTY award that Fallout 3 received from IGN.
(Now, somewhat ironic given where I am posting, I think one of the biggest missteps IGN have made recently concerns their article, "Top 5 Reasons Dark Souls Will Eat Skyrim's Face." I understand that the writer was trying to garner interest for a game that he thought many might overlook, but I do think his reasons were poorly demonstrated. But it was clearly a tongue-in-cheek editorial, and I think he had the best intentions.)
In summation, I think most IGN haters just aren't paying close enough attention to the reality of the situation.
