If you want to immerse yourself in a "realistic" RPG (no magic, no dragons, ...), then this is the game for you!
Great RPG, nice story, tons of side quests, quite a few DLC, ... Hundreds of hours of gameplay await you! :-)
Hardcore mode is an awesome addition to the game (you can play the game without seeing yourself on the map or without having a compass, so you need to check the sun's position to get your bearings), and only adds to the immersion..