Tbh the only time I find Fluttershy cute is when she's having a panic attack. (Or doing this, but everyone likes that gif. It's required by law.) Personally, I'ma have to go with RD. She may not be in a constant state of "ain't I just pwecious?" like FS, but when she is, it's downright heart-stopping. Spoiler: Case in point
I think, personally, everypony is cute in their own way. Fluttershy:Her innocence and kindness just got everyone's heart. Pinkie Pie:You should probably know that "Cute" is most used for babies and baby-like animals or stuff(science).Well, Pinkie is.... :3 Rainbow Dash:She may be a tomboy, but when she starts to act cute... >.< Twilight:I swear, you don't know how cute is a female nerd when she starts to remove her glasses :3 Applejack:I only found baby Applejack to be super-cute to be honest. Rairty: No... Just no.... No...
I don't think rarity is cute either, just not at that level. Plus she became annoying when she did that whole drama queen act.
I voted rainbow dash. To me, she is the cutest! I love her colors and her big pink eyes and her voice. I like it when she dances and says so totallyawesome.