If you like challenge and have lots of time to spare then gliding.
More expensive but with more freedom is paragliding.
Both are far more intellectually challenging than power flying.
My old uk club just had there first 750km flight..two instructors who have been chasing distance for the last 25 years.
Me I’ve flown three sites over the last three days and flown over 3 hours..have several thousand hours.
photo is from Slieve Gullion looking over Forkhill where my son in law got mortered for any pongos on the thread.