Garmin Vivoactive3 here. Timepiece part is marginally irrelevant, what with cell phone clocks and all, but I am trying to keep from getting TOO fat (old, I can't stop...but fat I can fight). Great piece of tech here - heart rate, GPS for outdoor activities (i.e. mountain biking - it pairs to Google Earth not only for satellite view of my route, but also uses elevation information to calculate elevation change and actual work load without having to have a smartphone with me during exercise), calorie burn estimates, programmable exercise routines (hiking, biking, rowing, running, swimming, you name it), and an outstanding app for compiling and tracking data. I can also change watch faces - digital, analog, styles, colors - so it's like umpteen-hundred watches in one.
I'm not a fitness-junkie-meathead (my physical stature will prove that to anyone here), but I did spend 6 months in PT back in 2008, learning how to walk again after a severe accident. Tracking my health is important to me, and like maintenance on my vehicles it makes it easier to identify anomalies as soon as they occur, and before they become catastrophic. I do 1,000 meters a day on my rowing machine. I finish, and my heart rate is 160. Every. Single. Time. Three minutes' cooldown, and I'm 120. Every. Single. Time. If that changes at all - if my peak is 180, or my cooldown is 130 - I know something is up, and I start figuring out what it is. Especially now, with this Corona crap going around, I want to keep a close eye on my health status.
As for actual watches? I have dad's old Timex, and HIS dad's old pocket watch. I need to look at it to see what it actually is, it's just been on display in my cabinet for years. I think I still have my old Timex, as well - a gift from dad, engraved for when I graduated college - in my dresser drawer.