For myself I really enjoy all the characters - I am most excited about:
Karlach because she seems like she has a compelling story to tell and she acts like someone who has a new lease on life and wants to not waste a moment of it.
Shadowheart because I think she did something very drastic to save the world, and her backstory may be completely insane. The courage it must have taken to give up your own memories to go on a life or death mission.
Astarion because of his really inappropriate sense of humor informed by his own past suffering.
Gale I have the most trouble with because I don't think he is being honest about a lot of stuff, maybe even to himself.
The problem is that Larian wrote characters with their own internal locus of control and motivations and I think many players have been spoiled by gaming companies that have presented characters that base their existence around you.
With these characters there is an equality to the interactions that to some must be jarring. There is a larger conversation here where I would point the finger at these AAA studios who have created games that pander too much to gamer whims instead of challenging them properly. They create unrealistic characters - I wonder if that has an effect on how they interact with people irl and the ability to form friendships.
