The IT people who I talk to like even it in its current state better than either windows 7 or windows 8.1.
I expect it to be a better iteration than we have seen in a while.
Not sure what their reasons are, I myself happen to really like Windows 10's speed and efficiency with resources.
Microsoft really needs to drop the remaining "Metro" references with Control Panel for example. Popping up the Control Panel in a "Metro" like window is really bad form on the Windows 10 Desktop.
I don't know what they're thinking with keeping any "Metro" influence in Windows 10. People hated it with Windows 8.0 and 8.1, it's almost like someone at Microsoft can't admit that Metro in anything was a bad idea, period.
What I think Microsoft needs to do is bring back the Aeroglass interface. This flat Windows 10 interface is "ok" but sucks in comparison to Windows 7.