I am a college student, and I'm here to help GA.
Oh lord, not another one! LOL. ;-)
I didn't answer the poll, doesn't work well on Tapatalk, but the answer isn't on the list, or is "all of the above".
Flying is fun because it's flying. Heh. There's all sorts of sub-categories to that... working on difficult skills and mastering them, having a hobby (or job) that requires your full attention as PIC to ensure the safe outcome of the flight, putting around looking at cows down below, seeing sights from angles most of the world never sees, introducing others to those sights, alighting the winged machine with a soft chirp of the tires back to earth...
I got older and decided it was time to spend considerable resources and time learning how to pass along the stuff folks taught me, stuff that brought me great joy and also brought me great responsibility, and some of it that kept me alive doing it.
I suspect it would take multiple years to ever make back what the CFI cost in terms of money, but it'll only take a smile and a handshake of congratulations of a student passing and joining the ranks of folks who can do this stuff, to really make my heart happy. Even better to hear their stories of how much they enjoy it all over the years.
I'm just a middle aged fart who'll see to it that someone else knows how to do this stuff before I push up the daisies. Then maybe some of those will pass it along, too. Maybe they'll say a nice word about me when I do.
It was that or teach people how to administer Linux boxes. Meh. LOL. (Although I mentor in that regard, too... but it isn't the same. There's nothing magical about telling a box full of transistor switches to do stuff like send out billing statements. Haha. That's just existing. Flying is living.)