alt Hacker Newsyep, i remember playing Fallout 2 and Planenscape as well, one of the best summers ever (1998 and 1999). I discovered some glitch in Fallout to get more skill points ;) and Planescape, had one of the best plots ever in video games (IMO BG3 doesnt even compare ;))
In all honesty, the plot in BG3 isn't anything special imo. It's not bad, but neither is it something which stands out from the crowd of fantasy RPGs. Where BG3 shines is the freedom the game gives you to approach things how you like, not so much the writing.