B-But... They had hardly any screen time... Like Sombra. Sombra would've been a great villian if they gave him some screen time.
*Grabs you by the shoulders* King Sombra is gone. He's gone NarrowLeaf... it's time to move on. But seriously Cadence had one of the BEST personalities in the entire show. Of course I get she spreads love, so DUH. But her design was amazing and let's not forget that voice. And Luna is princess of the night dude. That's awesome.
Princess Luna. Luna is 20% cooler than the other options. If not more. Also, Royal Canterlot voice FTW!
Other means Twilight? Luna didn't surprise me but i'm really surprised that Cadence gets so much votes, considering that she started the alicorn controversy. I voted for Celestia, btw. Celestia is best princess. Why do i feel so hipster right now? xD
TBH, I still don't really count Twi as a princess (as of now), so out of Luna, Cel, and Candace, I have to say Luna is best pony princess, then Candace, and last is Celestia. I really can't stand Celestia that much and she (along with Spike) or my least favorite characters. (I only like Celestia in fandoms and parodies (same with Spike)). I like Candace, but Luna is best pony princess. She has more of a 'realistic' personality and her alter-ego NMM is the single handed best villain along with Discord. And according to most MLP polls I see on this subject, it seems that between 60% to about 75% of bronies agree with me.