I’ve got Win 10 preview in VirtualBox on my MacBoo Pro. I haven’t played around with it much yet, but annoyance #1 (same as Windows 8) is that you can’t even create a single user account without creating or using a Windows ID.
I mean, I know Apple pushes you to get/use an Apple ID, but at least it’s optional and they give a clear means of bypassing it (as I have on a Mac Mini I use as a home theater hub). But it appears that Microsoft makes it mandatory, or at least doesn’t give you a clear option on how to proceed without it.
Sure you can. But why would you not use a Microsoft ID. That’s where a lot of the great features come in.