I just realised: "Walking" as a hobby sounds so boring but I just love to see how much I can push myself on how many steps and how many kilometers in a day I can do. I have lots of challanges regarding this. One of them was a Lord of the Rings challange where you can put down your kilometers a day and it tells you where you would be if you were to go to Mount Doom and back. I loved this so much, it made walking feel like the biggest adventure.