As I understand, a suggested edit is not your normal edit that a 2k+ member would do. As it says,
suggested edits should be substantive improvements addressing multiple issues in the post.
and that's why we can reject them as "too minor" in the first place, but what actually defines a good suggested edit?
When answering the questions myself, I will often edit the question even for minor things like removing a signature, or fixing a single grammar/formatting error. I do believe though, that if it was a suggested edit, I would reject it as "too minor", hence sometimes when reviewing I'm not really sure if I should approve a given edit or not.
Any suggestions, apart from using common sense?