The great thing about the Fenix are the hotkeys and the shortcuts they provide.
Compared to a Samsung Galaxy Watch which offers only one hotkey (and two buttons)
the shortcuts on the Fenix 6 is like customizing your own experience to a very high confortable level.
Mine:
Hold START: Clocks (I need to have it ready all the time)
Hold BACK: Watchface (back to main screen)
Hold DOWN: Music Controls (being able to stop or adjust the volume without to look at the watch)
START + DOWN: Flashlight (Oh, it is so handy for navigation to the loo or the fridge ...)
START + UP: MOB
BACK + LIGHT: Save location
BACK+UP: None
What are your hot keys ? (->System/hotkeys)
Edit: It really reflects how people are using their Fenix.
I have adjusted mine as Stopwatch use BACK for laps. So a long press on BACK needs to be used primarily for going back to the main watchface.