- Goblins: Tracker Kirz, Brawler Tiny, Sharp-eye Sluck
- Absolutists: Thisobald Thorm
- And an honorable mention; the Kuo-toa! Love those fellas

Hmm, the goblins. I hadn't thought too much of. I think my favorite goblin is the one cooking dwarves, wearing blue jeans. I also liked Goblin Klagga I think his name is, because
I found his stash of balled-up love letters to Minthara, behind a waterfall
LOL. The Kuo-Toa.
I forgot about Thisobald.
The first time I killed him, my companions mentioned how he seemed more sad than evil. After that I always just slight-of-hand my way out of the drinking contest instead. "I'll drink to that! I'll drink to anything.. but especially that" I actually felt bad making him explode.
Hands down, I think the best writing and acting goes to animals. The Spiders in the Gobbo base, the various Cats and Dogs across Baldur's Gate, Scratch and Owlbear Cub - it all fits *SO* well. Even the disguised Redcap Sheep in the Swamp and the happy frog are hilarious. I found it especially cool to find out from a *cat* that there was a devil in the Brothel, or learn some of my own background from Steelclaw.
Perhaps they are too 'main character' but, Raphael and Auntie Ethel are personal favorites.
My favorite animals (aside from the obvious):
Myshka the cat
Myshka: Are you my mother? Me: It's me, my son. Mishka: MERMER!
His Majesty
Sazza, Drenn - All goblins deserve some love!
You specifically mentioned Sazza,
Did you do the "She Cannot be Caged" achievement? You have to save her 3x. I've never saved her, so can she actually reach Baldur's Gate? xD