Hmmm. After a decade of running, swimming and circuits I still detest them every day just as much as when I started.
The key might be that one can only enjoy activities that are done purely for whimsical reasons.
I dunno, I enjoyed all three from the get-go. Ballroom dance I suspected I would enjoy, but it took me a while to get to the point where it wasn't just work to do it (even though I enjoyed watching it.)
I know plenty of people for whom those things are flipped. I don't think "what you can enjoy from the get-go" and "what takes more time to learn you can enjoy" is constant from person to person.
Only recently have computer proofs become somewhat accepted. The holy grail is still to find simple proofs to interesting problems to enlighten people.