I follow athletics on all levels. I love to watch it from the kids to the seniors. There are a lot of great elements in it. A fantastic thing is that the results are clearly measurable. Everyone can follow their own or someone elses development.
It is very international. It has a long history and culture around it.
It is based on basic movements of most sports: throwing, jumping and running. Still, there are many very different diciplines. In top level, the amount of details to focus and develope, is amazing. And as every athlete is different, the training and path to become the best you can, is never simple. That all makes it so interesting.