I could see P4 MC paring up with Rise or Naoto (ironic since he ended up with Yukiko in my first playthrough - but the further along I played the less appropriate it seemed. confused ) I liked Chie but even during the dating scenes she just seemed to be set up more as a friend rather than a love interest. That and the lack of any females within their "friendship" makes me rather suspicious of Daisuke and Kou. XD
P3, I must confess I haven't gotten that far into yet, but the MC and Mitsuru seem like a good fit somehow. Or MC and Elizabeth - gotta love that hat.
Are we doing P2 as well? MayaxBaofu. Seriously, it's hilarious. And even the creators themselves ship JunxTatsuya, which I also find hilarious.