As of Early Act 2:
Favourite Personality: Karlach. Excellent idle animations, dialogue for dismissing and adding to party (many different lines), and is just a fun presence in the game. That’s it. She’s just so fun. Her quests are not though.
Favourite Character Arcs and storylines to follow: Laezel, Gale, and Shart. Loved the Red Wizard interaction.
Astarion and Wyll can be fun, but the former is such a little shit and the latter can be hit or miss.