Hot take: I liked Windows 8. It used less memory than Windows 7, increased battery life, the file manager and task manager were much improved, I could mount ISOs without third party software, among other things. In truth, I didn't even mind the start screen. And I certainly liked Metro as a UI paradigm much more than Aero.
Of course it was still Windows at the end of the day, but 8.1 was my last Windows. The laptop I ran it on is slowly bitrotting in a storage locker somewhere on the other end of the country. I didn't like the look of Windows 10, several aspects of it were hard dealbreakers, so I never swapped to it. Eventually I just changed over to using Linux as my primary OS and haven't really looked back.
I didn't care for the UI at all which is the most common complaint about it. But it was the least offensive complaint to me, the existence of the Microsoft Store was had me looking for the exit. I guess I overestimated Microsoft's competence because the store remains an irritating tumor that hasn't yet metastasized.
Unpopular opinion: Windows 10 is worse. You could still control updates and uninstall or never install the telemetry packs in 8/8.1. And the UI problem could be solved with 3rd party tools. Windows 10 had the spyware baked in and got more annoying over time. But poor adoption of 8 and Microsoft abandoning it meant that in practice driver and software support for 8.1 often disappeared before even Windows 7.
I ran Windows 8 and the 8.1 on a Surface Pro 2 for about two years as my daily driver. It was great for travelling with since it was so lightweight and easy to use in cramped airplane seats. However, I never bothered using any of the "modern" applications at all.
Windows 10 was certainly an improvement.
My converse hot take is that I actually really liked Aero, I've always had a thing for translucent UI elements and glowing things.
I was one of the few people that thought people would like it. That is, why shouldn't it be better to have a bunch of tiles on your desktop that have the most important information and then you choose the one you really want to concentrate on full screen? Well, of course the problem is you aren't using a tablet. It's trying to fix something that never needed to be fixed.
But yes, Linux is great now and most people on the site can easily debug potential problems they run into on it and not look back.