I liked DOS 1 very much since it had a nice story and a great combat system. I had to cheat to get past a few insane enemies, but otherwise a great game. DOS 2 was not as great imo, the story did not captivate me as much, but still nice turn based combat. I prefer BG3 though over DOS.
Whether I'd enjoy DOS 3 would depend on the story, but I doubt it could ever captivate me as a big game as BG3 can. I guess a game is only as good as the amount of love and resources put into it.
I hope I didnt sound to harsh, The main reason I uninstalled Dos1 , was the turn based combat, My first impression was I loved the graphics, once on the beach I found that side dungeon, it looked really good, I was humming happy, even with the turn base.
I left there and came around the corner, a much larger battle ensued, that is where I was like uGH, unistalled. Now that Ive played BG3 for hundreds of hrs, I may re visit it at some point.