Quick post today following up on my prior post about Features on Demand and role persistence:http://blogs.technet.com/b/joscon/archive/2012/08/20/understanding-features-on-demand-and-role-persistence-in-windows-server-2012.aspx

I've noticed people on the forums and other places have clicked through the setup process on Windows Server 2012 and ended up in Server Core (as expected btw).  I've seen several people mention they'd need to rebuild their machines to get back to a user interface, which was the case in Server 2008/2008 R2 but isn't true in Server 2012.  My colleague Mike Stephens recently authored an excellent post on how to manipulate the shell in Server 2012 using Features on Demand.  It's located here and I think its a worthwhile read for those of you interested in the servicing of Windows: http://blogs.technet.com/b/askds/archive/2012/09/20/windows-server-2012-shell-game.aspx

--Joseph