No user-hostile distractions of the type "the computer has decided that it WILL reboot NOW", no useless "everything is all right, update has been installed" popups, no "oh look, a new flashdisk - guess what, the computer has decided that it needs yet another product reactivation," no "new printer? lol no, insert driver glork splurk mumbo jumbo" which I've come to know and loathe in Windows.
Updates are completely under the hood, devices simply work when plugged in (which shocks me to no end, after previous experiences with Linux and W8 driver issues), no crapware, no spyware.