I love Archon's sole contribution to that thread.
I think that Yozora is most definitely a bitch, and that those who think she's just trying to be kind to Sena are seriously mistaken; but she's a funny bitch, and the fact that she's kind of angry and rotten inside makes her interesting and relatable. I love drama, angst, and generally dark and miserable things in stories, so I'm not the kind of person to hate a character that drives much of the conflict - they're often my favorite type.
If you mean which one I'd be interested in romantically... Yozora's a cool girl, but I'm not attracted to her. Sena is hot, busty, passionate and emotional (one of the main draws to me in a girl and potential romantic partner), and since she likes anime and videogames we'd have hobbies in common too. That guy at the hero show a few episodes ago might've been mistaken in thinking Sena was a mother, but if I was in Kodaka's place, she already
would be knocked up. Tap that ass already, Kodaka.