I haven't done a lot of reviews, mostly bug-hunting for feedback, but I like to review a game I don't know anything about.
I don't even look at the story or the genre of the game. I just play it and let these elements go to me.
If it's well done, it should flow naturally.
Sometimes, a game include a feature just for the sake of it and it doesn't mix well. Like having a strong story-telling game, with QTE fighting sequences. Unless it's cleverly done, it feels off and should be noted in the review.
A bad review would be to be biased, like expecting a game to be something it isn't (nor ever said it was) and then blaming the game for not delivering.
Of course, there are the basic elements: game&level design, sounds&graphics, story&characters and so on.
Even a game that says "I'm not focused on any story, just the action!" would have a side note about its lack of a proper story, because it's a bare minimum nowadays.
Typos should also be mentionned, but it depends on whether it was a few cases here and there or a complete disaster.
I've played a lot of French games where the misspelling were so numerous that it actually prevented me from playing. My eyes were hurting too much
At the Alex d'Or RPG Maker Contest, I know that several games have lost a few points because of that, so yes, it's important even for amateur games.