@Shinetsu - You're list: Ichika, Itsuki, Yotsuba, Miku, Nino?
I'm not even gonna lie, early on I was pretty convinced that Yotsuba may have been mildly retarded by how she acted. A sweet girl, but missing some hardware. I personally felt that Fuu as a character fit best with either Ichika or Miku personality-wise. Nino certainly grew on me over time as well. First impressions can be hard to shake, though.
Like I said earlier, I don't really care that Yotsu won, but it really does feel like Negi was so scared of people guessing who Fuu would end up with that he was too scared to actually develop their relationship until it was too little, too late. Which really kind of made it all fall a bit flat in the end.