Mine?
You guys know I have a certain weakness towards Redheads, so Keina is my favorite girl, followed by Korone and Hattori. Don't care about Etou and the president girl (whose name I still don't memorize) hasn't made me like her yet.
Still, I can't help to notice Keina isn't a central character on the intro... where Junko seems to be the central one, thus making it weird she gets the spotlight on the ending. Though, like Archie said, she seems to have a story with Akuto, so she definitely is winning on the race.
Bah, lets just have a harem and we will all be happy.