Sailing. Is that a "hobby"? I grew up doing it,raced a lot, nowadays teach it as a part-time gig, so I get paid, and am allowed to borrow the school boat(s) now and then. Nice.
Volunteer work. Surprising (or not) how much time that takes, and you can't "make" anyone do some given task ;-)
Golf, but not often anymore. I took up golf and scuba in the same year two decades ago (useful tip--it's safer to stink at golf ;-)
Cycling. For exercise, road bikes up on the paved levee bike trail. Jogging. Swimming. Running races when younger, triathlons occasionally, (your joints last longer if you alternate using them as in swim, bike, run)
Used to ski a lot as a young dude, in New England. Then moved south to New Orleans where the warmer water got me interested of getting in the water and not just sailing on it.
In each sport (hobby), I went through a "do it a lot, you're learning" phase, wherein the other pursuits took a back seat. Diving was that way the first couple of years. Now it's a couple or three short trips a year, but I still enjoy it. Sorta like raising a kid?? Lots of devoted effort early on, then less, then mostly tapering to "maintenance level", or mostly hands-off. I skied not long ago out in the Sierras for first time in 25 years, could still do it but my quads were not happy.
Then, there's "work". Is that a hobby??
Didn't think so...