Granny Smith, Derpy Hooves, and (personal favorite) Princess Luna don't seem to be that purple to me to be honest. Luna is more like navy (very dark blue, almost black). So do a bunch of other characters.
Speaking of Princess Luna, while Luna gets the chance to show off her absolutely immense power every once in a while (vaporizing monsters in nightmares, etc) Celestia never seems to get the chance. At least, not without getting her pure white, crowned flank kicked. I wonder if I should be looking forward to an episode that showcases what she can
really do if given the chance, really angry, or both.
Celestia's trickster mentor tendencies can be annoying to be blunt about it. While it is sometimes endearing to watch and can even be funny, sometimes she unneccesarily extends/exacerbates/creates new problems by doing so. Case in point: Crystal Empire *COUGH*.
And sooooo, did anyone catch the Celestia x Discord moment at the season 4 finale? *naughty, all-knowing-one smile*
I read from Tvtropes that during the Equestrian Games, Twilight, having been crowned princess, gets an assigned seat away from her friends , and from her wistful look down to her friends, she clearly doesn't enjoy it. While I think that sucks, couldn't she have just, y'know, ASKED to just be down there with them? It's like no one's out there to kill Twilight like a fanfic i read. Speaking of fanfics, try to look up The Great Alicorn Hunt, it's a nice one.
Sorry if I sound cloud-cuckoo and off-focus like Pinkie Pie, haha.