Companions are one of my favorite parts of the game! I love how much content they have given companions: quests, camp scenes, banter, and other dialogue! It is great!
For BG3 I Iike doing good path playthroughs, so likely my favorite companions are either not in the game yet or are in the game but not companions yet since they said we only have the evil and neutral companions so far.
Of course if Halsin is a companion, he would be my favorite companion by far!!!🐻🐻🐻
Of the companions currently in EA Gale is my favorite. I especially love his barks! Sorcerer Tav also has some fun sorcerer-wizard rivalry dialogue with Gale. I also love casters in general. His romance is a bit too Claude Chabrol for me, though.