Looking through my grandfather's old logbooks (1920's bush pilot in Mexico and AK, 1930's-1960's AF pilot), my favorite part was his comments. Some of the stuff he did, or was forced to do, was eye watering from a modern aviator's perspective. One entry was "engine died 10 seconds into flight. crashed in field"....from a Curtiss Jenny. Maybe one day I will have kids or grandkids who, like me, will like to read a little bit of aviation history in family logbooks. So I can appreciate the desire to include comments, for nostalgia's sake.