I don't know if being solar powered is still considered mechanical, but I've almost always had a watch. My least favorite feature of the fit it was that it didn't wear comfortably with a watch, and the fitbit watch sucked. As did a couple other fitness tracking watches I tried.

Gave up on that nonsense and went back to my trusty Seiko, then let my wife upgrade it to a Citizen. Don't need anything fancier than that. Kinetic watches were OK too, but I prefer solar.

I like a few dials and gizmos on my watch face, but I hate the date function. They never work properly with our screwy month system, and I can't be bothered to fuck with my watch every time a month has less than 31 days. However I don't mind fixing it for DST twice a year.

I also like second hands that tick/stutter a bit. I don't trust them if they move too smoothly.