A staff review on a game site has one duty. It must provide enough information that a typical reader who is interested in a game can ask himself "Should I buy this game?" before going into the review and have a better idea of the answer by the time he finishes reading. That is not optional. It must happen or the review has failed. Period.
Subjectivity and objectivity are just words. They dance around the issue, but the real point is that a staff review--because of how it is by necessity presented--is a judgment of a game that someone is about to buy and it's a recommendation based on the reviewer's personal opinion, his knowledge of games and his familiarity with what gamers like him are looking for in a game.
Some people make the mistake of reviewing a game and trying to show pure objectivity. They work hard to avoid including their own opinions and perspectives, as if somehow personal preference and fact can be separated by discussing an inherently subjective topic. That's absurd. Equally absurd are the people who say "Well, since a review is just my opinion, there's really no point in trying to include something that doesn't matter to me personally!" At least when a staff review is being written, there has to be a reasonable balance.
The world would be a better place if people stopped trying to choose sides on the objectivity/subjectivity front and just wrote about their experiences in a way that means something. Make clear your own impressions and give the reader enough information that he can form his own impressions. If you'll look at the best reviews on this site or any other, you'll find that they all get that part right. Some people are just too busy arguing about subjectivity and objectivity to notice.
"Too often we enjoy the comfort of opinion without the discomfort of thought." - John F. Kennedy on reality
"What if everything you see is more than what you see--the person next to you is a warrior and the space that appears empty is a secret door to another world? What if something appears that shouldn't? You either dismiss it, or you accept that there is much more to the world than you think. Perhaps it really is a doorway, and if you choose to go inside, you'll find many unexpected things." - Shigeru Miyamoto on secret doors to another world