Maybe IWD had a good story, but after killing tons of monsters in a dungeon I have forgotten why I was there and I lost my motivation to go on.
Lets just say I am not a big fan of dungeon crawlers and I prefer games that focus more on characters and story.
Maybe it is just the fact that all chars are created by yourself.
I played BG2 once with a party of self made chars but I quit soon after. It was just boring without Minsc and co.
I finished only one dungeon crawler (Mary Skelters Nightmare), a JRPG were all characters have a personality and there are many scenes that show the relationship between those characters.

Prof. Dr. Dr. Mad S. Tist

World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already