I upgraded to 10 on my HTPC, but then I dual-booted with Linux Mint and found it does everything I need, so I’m not booting it into Windows anymore.
I really don’t like the way Windows 10 phones home to the NSA every fifteen seconds.
I’ve pumped the brakes on upgrading to Windows 10 on most of my machines. I don’t appreciate the telemetry/surveillance one bit, not to mention the forced updates.