Trying figuring out the future. Think you're going to be 24 forever and enjoy doing XYZ? A wife and kids really change life. Age changes life. Life changes life.
I had a BLAST from 20-26. Great jobs. Left all of them because while fun they weren't life long jobs. They were resume and experience building jobs.
Now? I enjoy the heck out of flying a boring flight and waiting for the paycheck to be deposited. And while it might be boring I fully acknowledge the passengers are being given the best care they can get from three pilots with probably 15 type ratings and 45,000-60,000 hrs total time between them. Some of that experience was gained doing fun, dumb, and crazy stuff while we were younger and the job required it. The last thing we want in this job is excitement.