Editing is all about balance.  While it is important to correct obvious flaws in structure and punctuation, it is also crucial to uphold the author's own voice and not leave it swamped in grammatical drudgery.  As an editor, my goal is to maintain the feel and flow of your writing while paying close attention to detail.  Educated in the British grammar school system, I have a love of the English language and am quite meticulous by nature; however, in most cases, my work is merely a suggestion rather than a mandate, and will help to put the finishing touches on your article and ensure you are happy with the result.  I look forward to working with you on your next project.