For a normal User I think Linux has been almost perfect for decades. For Games Windows still had some advantage. But for developing software I really didn't like Linux. The windows API is very stable. In Linux constantly new problems showed up. E.g. some window-manager suddenly started stealing my focus, just because it wants to have the focus on an irrelevant Edit-Field somewhere... If Linux wants to be the standard I think it should have a stable Api first. And I don't have much hope in Gnome and KDE doing anything like that.