(Sorry for my poor english)
Good work! I agree with you. What is not generally noticed is that most reviewers do not have certified critical skills (academic degrees etc. etc.). Many reviewers, unlike literature, art or film critics, are just amateur. For example, many reviewers evaluate the story of a game, but (these are just a few examples) they have never read or heard of Dostoevskij or Musil, or they don't know the difference between ethics and morals, tragedy and epic, etc. For this reason, GTAIV (however one of the most buggy game ever... but this is a Rockstar's game, so this doesn't matter for the videogame reviewers) is considered, by most of the reviewers, as one of the most beautiful videogame stories ever, when in fact this is nonsense. For me this is the biggest problem of videogame's reviewers. Unlike the critical theory of film (or literature, art, music) the world of videogame reviewers is at the level of mere opinion (which is not a critical judgment; indeed, an opinion is always equivalent to another). Just a few examples: Roger Ebert, Greil Marcus, Terry Eagleton, Rosalind Krauss, they are all authoritative and influential critics and reviewers. I cannot agree with them, but I recognize their competence and the quality of their work. In the videogame's world there are critics like these? Currently (correct me if I'm wrong) the answer is no.
For reviewers, I've always liked Desslock, Jason Ocampo, and especially Greg Kasavin.
Of course, Greg's now w/ 2K Games...
About GTA4, I thought it was a very-well told story - but, a lot of that had to do w/ the excellent cinematics and excellent voice-acting. Personally, I think Planescape: Torment is one of the best told and written stories ever put forth in gaming.