Another one - sorry, I'm on a run right now.
What are your favourite characters (doesn't have to be companions, sometimes, one just clicks with a random character) and what storylines/quests/areas you like the most?
I have a bunch of characters, I love - outside of our four legged freinds (Scratch, Owlbert and Us) , those are probably a given with most of us

From the companions, I really love Gale, Karlach and Jaheira. They are so chill and fun to be around. I found a big appreciation for Wyll lately and use him a lot in my playthroughs.
Gale gives really nice good friend vibes. His scene in act 2, when you can help him through a panic attack is so reliable. ANd he is a total bookworm, which I can rely too.
Karlach is just so fun to be around and I just love to have her in the party.
Jaheira is Jaheira - I loved her in BG 1&2 and I think, she got even better in BG3. She seldom leaves my party as soon as she is recruitable.
NPCs I really love:
Barcus
He is just an all around great character and I wish, he could have been a companion (along with the artificer class). I love his development and story a lot.
The Hearthflame sisters
Hope has to be saved in every playthrough, I do. I adore her. And I do like Korrilla. I want to know more about those two and what happened, that they got involved with Raphael. (And I think, Korrilla is one of the prettiest female characters in the game)
Arabella
She is my favourite out of the tiefling children, though I like them all. It's sad, we might never know, what becomes of her, but her storyline is great and her inetractions with WIthers are the best.
Gandrel
I don't know, I just like him, he is pretty wholesome
Omeluum
Our chill mindflayer neighbour. I wish, he could be our ally in the end against the Netherbrain
Florrick
I'm a bit lowkey in love with that voice
Aylin and Isobel
My favourite lesbian couple. I was so happy, when those two joined my camp. I especially like Aylin, over the top as she is.
Abdirak
First time I saw him, I thought 'Yay, a fellow gothic'. I just like him, chilling in his bdsm corner and warning us that the goblins have blood on their mind ('Honey, we are the reason, they have blood on their mind

'). The voice actor is pretty versatile. When I heard, what other character he voiced, I couldn't really believe it. That guy has range for sure.
Rolan and his siblings
Love those three as a team and always make sure to keep them save.
Favourite baddies
Auntie Ethel is great, love every conversation with her.
Raphael is good too, teh voice acting of course is top. I just hate, that he was kind of underused, the deal didn't seem that impactful and the whole Haarlep thingy was just juvenile imo.
Ketheric: great build up and good character.
Gortash: I like his involvment, I don't like, how he is implemented. I love the idea of one of the the Chosen being a powerful political figure , who is versed in intrigues and getting people to do what they want, but I don't like , that this is underused with Gortash and that he is in fact totalyl missable outside his boss fight. Like with Wyll, he should have more impact in Baldurs Gate. Still Jason Isaacs is good as always.
Areas
Underdark is just so pretty, I love just running around there. And teh music, when you first enter it is so peaceful.
I honestly love the whole of the Shadowcursed Lands. As a Lovecraft and general horror fan, I love the vibes there, even after all teh playthroughs. That part is creepy and dangerous and I'm here for it.
I know, most people hate it, but I love the Iron Throne - love the setting, the steampunky feeling and the quest.
The swamp in act 1 - same as Shadowcursed Lands: I love the creepy uneasy feeling. And of course Ethels quest is just so much fun.
House of Hope: I kind of liked Raphael in my first playthrough before doing HoH. It really hammers home, how bad he is (I meanyes, duh, devil, but he comes across as pretty chill before). Speiking with Hope nad finding all the lore tidbits there are my highlights. Seeing how the debtors are treated really brings home the fact, that you don't want to be endebted to a devil ever. It's nice and creepy.
I love some of the camp sites too: Underdark, Grymforge, act 1 default are all really nice. I also like the harbour camp in act 3, though I sometimes use the Elfsong room.
Honourable highlight mention: the bardsongs. I love, that my bards can just play instruments and those songs are so pretty.
So what are your highlights - characters, quests, areas, classes etc?