I think BG III has a great taste for humor, especially Astarion became one of my favorite whith his lines ("..and i wish i would drink of the skulls of everyone who did me wrong. life is tough) or (you can literally talk to animlas!")
but in a fitting, not to goofy way.

There are funny moments when you play as a drow as well, for example the goblins calling you "my drowness".
for me its pretty well done!