I've had an AW on my wrist since a few months after they came out. Recently I had my AW replaced for a cracked glass, and because of the way Applecare+ works, I had to deactivate mine before they'd send me a replacement. Shipping was delayed, and I was without the AW a day and a half instead of one day.
Turned out it was an opportunity for me to appreciate just how useful the watch has become to me. It's not one particular feature that makes it such a great piece of kit, but the combination of them. Sort of like a Swiss Army knife, only the individual tools seem to work better than they do on the SAK. Here are a few, in no particular order:
Receiving and replying to texts. The concept is basic, and my Pebble (the gateway drug) did that, too. However, the AW does it very, very well. If a simple reply is all that's needed, it lets me reply with standard phrases, or by writing on the watch if need be. At minimum, I know I've gotten a text, can see it easily, and respond when it's convenient.
Apple Pay. Doing this from the AW is so much easier than hauling my phone (or credit card) out of my pocket to pay for something, doing anything else now seems primitive.
Answering the phone without taking it out of my pocket, or if it's not nearby, and, as importantly, declining spam calls from my AW.
Timers. I use this feature at least two or three times a day, and it's really quite handy.
Shopping lists (using the built in Reminders app) are much more accessible on my wrist; I don't have to fumble with my phone in the shopping cart or wherever.
Weather at a glance, with more detail available with one press of the screen.
Exercise tracking, including heart rate, distance covered, and rate of travel.
Being reminded to stand at least once per hour.
Notifications for appointments.
Shazam on the AW, for me, is simpler and easier than on the phone.
Driving directions from Maps show up on my wrist, which is often less distracting than looking at the phone or CarPlay, and it taps my wrist when I need to turn left or right. It's one of my favorite features.
Controlling music playback on my AirPods, or on CarPlay.
Siri. I don't use it often, but when I do, it works pretty well.
Heart Rate, ECG, and Blood Oxygen level. Nice to have on occasion.
The UI. In my opinion, Apple nailed this one.
And, FWIW, charging hasn't been an issue for me. I've needed to charge mine during the day only two times since the first one I've owned, and it normally goes on the charger at night. Most of the time so does my phone. I've had a few occasions where I ran it for two days on a single charge.
I'm glad to have my Watch back. It does much more for me than it did when I got the first one (A0), because of the features Apple added over time, and because I've spent time fine tuning it for my needs. I currently have an AW6 GPS, and will probably upgrade in the next generation or two.