Now before anypony gets to my throat (as strangely enough seems to be the case with these kind of questions) I am NOT seriously into any of those best pony~~, best princess~~, best anything kind of questions. I cannot name one pony as best of favorite thereby demoting everypony else to not best or not favorite. All too often it seems like a comparision between apples and oranges to me since I appreciate all the ponies for their individual qualities and quirks.
The joke about Luna’s nominating Princess Platinum as best Princess in the textbubble is that that evening I played the role of Princess Platinum in a stageplay performance we did there.
But just to add a little fuel to considerations about Princess Platinum, the least regarded princess in all of the TV episodes, here are a few points which make her interesting:
“I expected that prissy Princess to run and hid, but much to my surprise, she haughtily flipped her hair and stood her ground.”
“The princess composed herself and claimed that she would have gotten her wits about her and found a way to defeat the manticore. I had to give it to her. This Princess Platinum was not willing to go down without a fight. But then neither was I.”
“As I cleaned the muck out of her mane, the princess then asked me if, as her new best friend, I could give her lessons on how to speak in the Royal Canterlot Voice. She thought it was simply fabulous! I couldn’t help but smile. We have a feeling this is the begining of a beautiful friendship!”