BG1/2 weren't perfect especially for modern games. They also had bugs like fog of war exploit but they were consistent.
And when they were not, your imagination could easily do the job. According to me that's a reason why those games are so legendary.
Depends on what you mean by consistent. Because the fog of war wasn't the only issue with the combat system. Someone (I don't remember the player's name anymore, but the videos were on yt at some point) did a very entertaining let's play of the entire saga with a level one character. It was possible due to the ridiculously overpowered items BG2 gives you, combined with weak enemy ai.
To answer the OP: What I like in cRPGs most is worldbuilding & exploration. I enjoy challenging combat, but I've played and enjoyed games with had terrible combat (Arcanum :D), so it's not a must. Though tbh I don't find the D&D setting very interesting, but the BG games had great exploration, and so far I like exploring in BG3 too.
