Punctuation
Identifying poor use of punctuation will feel like an excessively nit-picking thing to do. However, the lack, or misuse of commas especially, can make some people's writing extremely difficult to read. Torturous, in fact. Constructing complex sentences goes with the territory here. Either you use short sentences, where the point is difficult to expand upon, or you venture out into verbose territory. If you don't break up your sentences, in order to emphasise certain phrases, then the whole logic of the sentence is lost. They also provide a rhythm and pacing to sentences, that make the process of reading them back, much more entertaining.
This isn't a case of bitching, or letting pedantry get in the way. This is about whether the basic meaning of writing is being properly communicated. Putting together a long review is a time-consuming process. Why handicap your work with poor punctuation? Why limit the number of people prepared to battle your prose style, to get meaning from your reviews? It isn't the easiest thing to do well, and this is a reminder to myself, as much as anybody else.
A good tune played with voice and acoustic guitar is still a good tune. It becomes a great tune when it goes electric, adds a backing rhythm guitar, and then lays in a beat, on drums and bass guitar. Punctuation serves the same basic function.