What phone are you using?

Samsung Galaxy S22 Ultra

Are you happy with it? What are its best and worst qualities?

Best is screen. Worst is battery. 3-4.5 hours of SoT. Also, it stutters all the damn time. I know most people using it will say it doesn't, but for me most animations stutter. Every 3rd time I open the Edge panel, and about a third of the times I interact with the device.

Which phones have you had previously? Which were the best and worst of the lot?

Galaxy Wonder, Galaxy S4, Galaxy S7, Galaxy Note 9 and Galaxy Note 20 Ultra. Galaxy Wonder was pretty bad at the time, and has not stood the test of time. It quickly became unusable. Galaxy S7 was pretty solid but nothing special.

How often do you upgrade to a new phone?

2-3 years.

What other Android ecosystem devices do you have? Watches, headphones/earbuds, etc.

I have the Sony WF-1000XM4 earbuds which got the infamous battery drain due to a software update one month after warranty ended and I can't wait to replace them. They don't last over 5 minutes on one charge. If it wasn't for the battery drain, I would keep using them for a very long time. Superior noise cancellation and sound quality.

Do you also use any Apple products, or are you Android all the way? (And/or Windows, Linux, ChromeOS, etc.)

I have an ancient iPad that is unusable at this point, and an Apple TV that I received for free many years ago. Very recently, I started using Android TV almost exclusively. The only feature I really miss is AirPlay.