Shadow Heart looks like a cute teen goth, she's better than Josephine and Cassandra from the Inquisition combined. Making her a mysterious and a feminine half-elf was a good decision. Her romance is very sincere and kind, PG13, but for now. In the future, she will reveal herself as a character even more interesting. For good and evil heroes who like the classic girl archetype.
Laezel is more brutal and dominant, evil, but an obvious option for good characters who like Strong Woman. It's not bad, but a little out of my taste. Maybe I'll leave it for the third playthrough of the game in release.
Minthara is the perfect Strong Woman for an evil hero, she has everything that people love in drow - my top 1. Very charming bitch, I love her and her dominance - especially considering the fact that I play as a male drow wizard, I am ready to do anything what will she say. Nevertheless, I hope she will also have the opportunity to show herself in some moments weak and in need of our protection in the future when she will really trust us and consider us her friend. I also expect her to act of her own accord and not as a mind flayer puppet, and that there will be an opportunity for a happy ending.
Astarion is a great option for an evil female character, as well as for bisexuals. Although, he's so charming that some good guys will romance him. I'm not surprised that he is the leader in the amount of fan art among female fans.
Gail is a standard, easy option for a good female character without much kink. This explains its popularity.
Will is just a misunderstanding, I don't understand why he is needed. I think it will be revealed later, when we meet Mizora, it's too early to say anything about it. But if he has a bad demon girlfriend, why is he so "good"?
There is also Karlach and some halfling-werewolf girl who are going to add, but this is trash as for me, I don't care if they are in release or not. In my party they will be at most companions, if I decide to take them at all.
Now my party looks like Laezel, Astarion, Shadow Heart, I would replace one of them (most likely Shadow Heart) with Minthara if she is still added as a companion.
This line-up suits me completely and I don't need other heroes.
Minsc already has the love of his life, this is the space hamster Boo, I can't say anything about him - let the girls say. I suppose it will be a popular compion, but not a popular romance.
