Of course the huge fandom of it, containing various ages, despite to it's meant to be for young girls.
The lesson of you can make something loved, just have to wrap it up good. The thing, that liking a show like this, does not mean there is something not ok with you.
The numerous writings, music, animations...etc. made by fans, and I hope they will continue to be produced.
I can give it thank because I found true friends irl, who also liked the show.
So, many positive things. Ok, there are dark corners of it, but what does not have?