For now I like all the LIs in this game. As long as none of them have a fetish like domination or BDSM I think I will continue to be nice and give them all the points. The MC has love for all LIs.
At first I didn't like Emma too much. But now I have a different opinion and I quite like her. I like Aine from the beginning, she seems kind enough and she's sorry for what she did . I don't think it's difficult for them to redeem themselves from what they did, and from what I've seen Aine is more than willing to do it (as is Emma, albeit in her own way). The MC doesn't really see Gwen as someone who bullied him at school, so I don't think the MC thinks he should redeem himself from anything.
It's not exactly a game where you seek revenge for something that happened in the past. The MC has shown greater wisdom than most players (among which I surely include myself) by forgetting / forgiving the 3 bullies and moving on with his life.
NiiChan is really developing a great game.
I voted for Freya. But I think the remaining LIs are pretty close to her. Maybe the second would be Sky, and right after Sky... the rest. I wouldn't be able to list them in order of preference for now.