I’m that weirdo that wears an Apple Watch on the right, for health tracking, and a regular watch on the left because I like the ‘old fashioned’ mechanics of it. And because they’re a thousand times prettier than that black square on the other wrist.
Sometimes people ask me about it, when I explain it they shrug and go on with their day.
I have a 6 with about 85% battery life left. I wear it all day, and leave it in the charger an hour before I go to bed, then wear it at night.
In the 2 years I’ve been doing this I’ve had maybe 3 times where the watch didn’t make it till the end of the day. Most of the times because I had used it for navigation, or some background process had been eating my battery.