There is a sweet spot. And I acknowledge that it's a place that hard to reach. BG2 found that place. IWD didn't, neither did DOS2

You want to have enough of structure to allow the imagination to stick. Just like with glue -- if you want something to stick you need to prepare the surface first.

Granted I can go through IWD imagining that I'm the son a god of death and that my enemies are standing in the way of my destiny. I can go through DOS imagining that my character is also an immortal but one that supported the God King and that really resent Fane. But that's really throwing lots of ink at a blank canvas.

Not easy I grant you but it can be done.