[TwinkleQueen]

I know nobody has replied to this forum in years, but what about Princess Cadance? She's the pretty pink princess of love who sings a surprisingly well-composed duet (for a children's cartoon originally designed to market toys) with her evil counterpart. Some may argue she hasn't much characterization, or that she's bland, but I actually kind of got into the show for a little bit after stumbling across "This Day Aria" online. I don't really watch it anymore, but I do like the colorful pony characters.
I also am kind of partial to Diamond Tiara, but mostly just for her design rather than her personality... I know, I'm shallow.