I really like the raw-ish titanium look of the Watch Ultra, as titanium is one of my favorite metals, and the screen looks amazing, but my favorite thing are the new Watch bands. All this being said, I moved away from the Watch (my series 5 got passed to my mother-in-law) earlier this summer for two main reasons.
One is battery life - I just didn’t want to have to deal with charging nightly, or each morning (or both times) as I was trying to wear the Watch 24/7 for health and sleep tracking.
The other issue was the rectangular shape. Prior to getting the Watch, I had worn my Seiko automatic 24/7 for 15+ years, and loved it’s traditional shape and rugged, heavy stainless steel case and band and scratch-free sapphire lens, so I really wanted to get back to a round form factor.
I ended up with a Garmin Epix 2 and don’t see changing back to Apple Watches any time soon. The 16 day battery life is awesome - it’s such a game changer to not worry that when the watch has just 10% battery life remaining, knowing you have 2 days before needing to charge. I can’t make calls or send texts on it, which is probably the only thing I miss from the Watch, but it’s not enough to get me to switch back.