I realized something earlier today that applies to this.
I read a book recently,a very good book, about how subtly our brain works to block out certain information, to help up make sense of things.
When I read this I though, "Please, I'm more open minded than that, I don't hate change that much." However, I had an argument with a friend about Gears 3 a while ago, about how it's just another Brown/Grey, cover-based shooter.
I later borrowed the game, and I thought it was fun, "But it's still another of the same," I thought to my self.
I have realized though, that no matter the positive aspects of the game, I still judged it negatively, because it's colour palette is brown, a red-brown or some brown with yellow spots.
Despite the game being huge fun, I ignored the information that did not agree with my original judgement on the game. I have decided that, even though GoW3 has a bad colour palette, that's not why I should be critique it, I should critique it because the story is crap(IMO at least)