I understand the reticence. Microsft tends to release a very good OS followed by an atrocious one, but if you follow the pattern we were due for a very good and MIcrosoft delivered.
Following the spectacular failure that was Windows 8, Windows 10 is fantastic and easily the best OS I've ever used.
Improving over the already great Windows 7, Windows 10 is beautiful, has a gret ui, brings back the start menu and the classic windows functionality, but with a more modern look.
It's stable, has been crash free in my experience for years (and that's for a power user), it's very intuitive, has the absolute best driver and device support out of any OS I've ever tried, with mostly every product just working plug and play.
The security suit is the best it's ever been, completely eliminating my need for an external resource heavy AV software, resource management is spectacular for a product of his features (I'm currently using a 10 year old PC with DDR2 and it runs superb).
It's very efficient, safe, intuitive, vastly available, compatible with mostly every software available, and looks better than any of its predecessors.
It comes with a robust set of basic programs but it allows you to replace them by alternatives of your choice (and integrate those fully)
Price could be lower, the included web browser is a very inferior option.
It's not easy to disable unneeded features.
The "Windows store" even years later is still a failure, and inferior to just downloading standalone versions of those programs.