I wear it 23.25+~ hours a day and charge it while i drink coffee in the morning (probably 30-45m on average, while i sit at my desk). I wear it all day, and while i sleep for sleep tracking.

I get annoyed when they say 18h and people freak out.. i'm not sure what they're testing vs my daily usage but it doesn't feel the same. I assume it's like 18h with a ton of screen-on time?

Either way i wouldn't wear a watch that i had to charge for 6 hours a day, and the Apple Watch is definitely not that. Hasn't been that for at least as many generations as i've owned.