The 10% that annoys me is mostly around the way update works. If you have long running processes (like security camera DVR software, big render jobs, etc...) having the OS decide to reboot in the middle of the night is a bit of a headache. I know you can disable the update service, but it would be nice if they just put that in the windows update UI.
The other part that bugs me are the re-appearing bloatware apps like 3d builder, weather, contacts, xbox, groove music, etc.... The flipside of the reappearing apps issue is Microsoft uninstalling my VPN client. They don't think it's compatible with W10, but it works perfectly for me so I have to reinstall it every time.
To get back on topic though, Microsoft's Azure is fantastic. The earnings boost is well deserved.