Around 2 years ago, I bought a Surface Pro 4, and it has been pretty great. I’ve used Macs since the early 2000s, so it was weird. Last Windows computer I had ran Windows 98.
Windows 10 has been really good so far, but there were initially problems with Windows 10 not playing nice with some Intel driver. Fixed long ago.
Annoying things? There are quite a few. I find Windows Explorer requires actual effort to keep it in a state that I like, but I do find it better overall than Finder. I never liked Finder. People have been asking for an overhaul since 10.2/10.3, but it never came. Another thing is requiring anti-virus, and keeping Windows Defender and the “real” AV up to date. It doesn’t seem to slow me down, but I hate that I need it. This may have been improved.
I find moving files with cut/copy and paste “better” on Windows. It’s more reliable. Weird, but true. OSX and Finder seems to like drag and drop more, which Windows doesn’t handle as well.
I miss Dashboard and its widgets. I know that Dashboard is one of the LEAST utilised features in the OSX world, but I used it all the time for its sticky notes and calculator.
The SP4 plays nicer with my hospital’s IT infrastructure, Citrix, Remote Desktop, and a few other things that either never worked, or weren’t reliable on my MBA.
I still love Macs, but I don’t own one right now. The ONLY reason I went with a SP4 was because, at the time, my options were another MBA (too expensive, long in the tooth, crap screen), the 12” MacBook with the single port that I had no use for (except power), and an outdated MacBook Pro that was NOTHING like what I wanted. That, and I found it hard to work from home on the (very) rare occasion that I had to.
My next computer will probably be a Mac, but it may also be an iPad Pro.

I have found the pen on my SP4 to be invaluable — to the point where I’m not sure I want to switch back to the Mac. Not being able to write on a full-fledged Mac, even as an option on any hardware, is odd. Sure,an iPad Pro is a solution, but iOS is not OSX, and it’s not a laptop replacement unless your needs are light. I need to mull it over again in 1-2 years.