Jessica is great and I'm glad there isn't an incest path. That would be weird in this game, and I wouldn't take it anyway. Having her as your unshakable best friend is great.
Finn was my #1 in this game, even though she was never meant to be a real Li - I would have just been with her, even if she didn't have much content. So far it's the only relationship in this game that feels earned - as opposed to you show up and she falls for you.
Fionna is next out of the big 4 but she's hiding something big - we don't even know her real name. When MC meets her she says "My name is F ...iona" and there are a few times when she looks at MC and does a sad sigh when he's not looking. Also not sure about her age. She keeps talking about dark secrets in her past but she looks like she's mid 20s maybe ... anyway. I like her but she's sus.
Medb I like very much, but she doesn't work for me as a Li. She's like 2000 years old, MC would just be a footnote in her biography. You wouldn't even have much to talk about, she already knows pretty much everything, or she doesn't care enough to learn it. Plus, having my best girl die and then turning around and starting a relationship with her mom feels weird to me.
Elea is just not interesting to me at all. Never found her particularly attractive or interesting. She's a co-worker who is good to go to lunch with sometimes and that's about it.
Kaija - I could absolutely never trust again. She would have to leave the templars behind completely, and get a normal job where she was home every night for me to even think about it. No more late nights, no more "business trips", no more mysterious phone calls - and not even in the civilian /non-combatant part of the Templars.
I have 6 saves, 1 for Fionna, 1 for Medb (even though), 1 for Kaija - but I still burned bridges and that save will probably die in the next update, and then 3 for side girls ... just because I'm unsatisfied with the main girls: Anissa, Kate and Kari.