If you played Baldur's Gate and wanted another grand sweeping adventure with interesting characters and a lore heavy story with lots of depth... play Planescape Torment instead, this is basically just one big dungeon crawl with the same game engine as Baldur's Gate.
That being said tho, it's kinda fun to use ID as a way to test out ridiculous party builds with all the class kits that none of the NPCs use.