I like Senri Akane best, but not her route. After reading rewrite, i think that each route has a different good point.
Kotori: a gloomy atmosphere, i really like Yoshino in this route, a love triangle
Chihaya: i must say that this route is the worst, just use to explain about kotarou's power
Lucia: a horror route, I like Ryuukishi07's style of trying deny the mystery but fail, and try to deny it again and then find out the truth. Bit the viewpoint is not good, especially when Lucia is alone, why did she need to scare of the truth that she had already known, she didn't need to pretend, like with the paper things, she was the one who wrote it, but she talked like she was really surprised when she was alone in the room, why she had to pretend?
Shizuru: i love this ending, sad but also happy.
Akane: just the action and Akane is good.
Moon: i think this route was written based on Ryuukishi07 concept and theory. The things about multiverse, life's theory,... brought a new wind to the game.
Terra: love this route, about kotarou's past, the explanation and reasons behind five heroines' routes. But Kagari was too bossy, how could Kotarou loved her?