I just voted for Oboro and Takumi. I'll probably vote for Leon, Mozume, Flora, Asama, or Sakura next.
Even though I really like only a few of the kids, I'm not voting for them since I don't want them anywhere near the higher places. I feel like if some of them were to rank high, then it could encourage IS to have kids the next game which I (and prob a lot of others) don't want.