A few in this thread, and I'll count myself among them. For me, searching for the right component is all the fun. I have heard a lot of very "good quality" and "expensive" systems that sound like garbage, and pairing the right things together takes time and patience, as well as a good (somewhat trained) ear.
Once my system was set, I didn't touch it until I had a component fail recently that I could not source spare parts for. I bought a new Lynn player and it matches my system well - my wife is very thankful that this did not spur the "upgrade fever" all over again.
For watches, the journey is similar to audio but different for me as well. I have moved from collecting to making them and tinkering with them, and that is again a whole other world of things to learn. I love it!
Cheers, Al