Non-linear quests. Interesting dialogs. Dozen of playable builds with absolutely different gameplay. Captivating buildmaking. The problem is most of new players cant create proper build. Moreover, there are no useful guides about builds (except russian guides on steam of course, but not everyone speak russian). For example the most frequent mistake is Mage have serious problems with mana replenishment. If you think so try to google "Lionheart Red Witch Build". Its the full walkthrough for fire mage. Better to see once than hear a hundred times. All of known proper mage classes (Inquisitor, Heavy Priest, Red Witch) have no mana problems. If you have any then you do something wrong.