I did not know i can use gmail ID to login windows 8.1

I have been forcing to use hotmail address to login to windows 8

today by chance , i want to test using a windows login ID as my gmail
surprise it allow me
or I dun know about it all the while

http://www.hanselman.com/blog/HowToSignIntoWindows8Or81WithoutAMicrosoftAccountMakeALocalUser.aspx

http://windows.microsoft.com/en-sg/windows-8/microsoft-account-tutorial

so ya I have created a local user that is gmail account

Anyway, my PC seem look ok for the time being
(by login to a local user rule out the possibility that my hotmail being roamed
in few PC and got this NetTop PC confuse and keep update to wrong settings etc ...)

let keep it this way this week.  After CNY then can look into other options ...