I don't think I had a moment in BG3 that I really enjoyed. I think there are some neat moments
dicovering true nature of hags marsh, sneaking into goblin layer, discovering secret basement under blighttown, first battle by the grove's gate
but they are always held up by something - be it small, singular map which ironically highlight artificial nature of the location, or poor combat, or lack of proper set ups and worldbuilding. A lot of stuff with potential, though.