Whether you started with a 2600 and a joystick in your hand, an N64 with a blistered palm or building your first PC in your teens, what is that one video game you've played at some point that to this day sits at the top of your list.
Morrowind: Nix hounds, kwama, guar... Cities made from the husks of ancient crustaceans... Fast travel networks with time consequences based on the speed of the insect you're riding inside of. Insane lore that feels like a real religion... Are you the chosen one? Is there such a thing? Have you been "chosen" or are you choosing to make it happen? Ash ghouls.
Everything else: Deer, wolf, bear... Renaissance-era European architecture... Instantaneous fast travel with no basis in lore. Dragons.
Great choice, Morrowind is incredibly well done. The mix of lore and mechanics made the world feel very real in-game. Being out in the sticks actually felt like being in the sticks.
100% Morrowind. No fantasy game has come close to giving me the feeling of wonder and adventure that TES3 has. It’s been over 20 years and I still reinstall it once a year or so to roll a new character and find new things to do.