I notice when doing reviews that I am getting a lot of posts to review where I am unable to make a good judgement call for.
While some posts can be reviewed independent of the subject matter, often, I have to say "Not Sure".
Perhaps the order in which the posts are presented for review should be based on your tag counts given the tags attached to the question. So that initially, you get posts you are more likely to be able to review. This would save time when reviewing.