Here is what sets it apart from other RPGs: 1. Amazing story with extraordinary choice and consequences 2. Only consequential combat - no filler, each combat is different, no grinding 3. Non-combat role-playing options - including ways to avoid combat 4. Lots of loot that is meaningful. So much good equipment that even with four party members it can sometimess be hard to decide which pieces to use. There is equipment for every character build. 5. Large areas to explore with many hidden secrets. High perception on at least one char is important. 6. Total immersion, it is easy to get sucked into the story with all the cinematics.
It is the perfect mix of: open world exploring, crafting, surviving, looting, base building, progress toward a goal with a touch of lore. Additionally, I enjoy how colorful it is and that there is no combat. I have already put in well over 100 hours and am sure to continue as more is released.