>>25218677OP here, I've thought about it and I've come to the conclusion that I still dont know a damn thing about Marble other than how cute she looks.
What I love about Fluttershy is her pure kindness and love of animals. She can be very troublesome at times with her social anxiety or shyness about public events, but these flaws are what I love about her.
The thing is, I really hate mean people. Like I cannot stand [next to] them. Fluttershy is someone who will rarely if not ever be mean to anyone because she has a heart that says "I want to make everyone happy everyday"
Lesson learned: I still think Marblestone is cute but Ive taken some time to realize that I should never get suddenly abandon someone I love just because someone new and flashy comes along. You'd be a horrible person if you did this to your soulmate irl wouldnt you?