Flying. Flying is also fun and challenging.
You have to think and act in three dimensions. You have the freedom to move to a lot of new spots on the globe. You learn to examine and appreciate scenery and natural phenomena that you'd never be able or wouldn't bother to see from the ground. Charles Lindbergh put it best: "Science, freedom, beauty, adventure.
" Sadly Lindbergh was, in addition to being a great aviator, a supporter of the Nazis. Oliver Sacks: What hallucination reveals about our minds. Life Hacks.