These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Tastes Like Diabetes: Everybody is too nice, flawless, happy. Even when the flashbacks occur and they show some episodes from people's past with "troubles" that they had on their lives, these episodes are depicted as not so bad, after all (even if your mother abandoned you when you were a child).
Though for others, this "flawless and happy" Slice of Life is actually a VERY welcome change from the wangsty and melodramatic nature of many jousei and shoujo manga.