Ryuuko was first in both the NewType female character ranking poll and the KLK character popularity poll. Sad news is Senketsu was 10. I'm sure he would have been much higher if the poll had been made after the final episode. Cutting it at episode 22 certainly helped Iori a lot.
In better news:
https://twitter.com/wirry_1l_The interview with Ami Koshimizu and Toshihiko Seki confirms Ryuuko/Senketsu as the purest love-story ever told.